Aprilia Riders

[Sub Zero]

just wondering, anyone wana order anything from http://www.adrenalin-pedstop.co.uk? Just an interest check. Theres really nt much stuff there if compared to pjme. Thinking of ordering the italkit 140 bbk. Shippings rather cheap compared to pjme.

 

This was one of the other sites I was talking about Ashraff. But the one I visited had prices listed in euros. What's the shipping charges for your italkit? I'm very very tempted!

[mesab0ogie]

This was one of the other sites I was talking about Ashraff. But the one I visited had prices listed in euros. What's the shipping charges for your italkit? I'm very very tempted!

 

the shippings 50gbp for 1, 60gbp for 2 cylinders. Its damn freaking cheap. The listed price of 300gbp is inclusive of VAT, so without VAT its only like 250gbp. thats like 40gbp cheaper than pjme man. at the checkout page, the final amount shown for one cylinder is 305.11gbp. it sounds too good to be true, but ive already emailed them about this so waiting for their response.

[Sub Zero]

the shippings 50gbp for 1, 60gbp for 2 cylinders. Its damn freaking cheap. The listed price of 300gbp is inclusive of VAT, so without VAT its only like 250gbp. thats like 40gbp cheaper than pjme man. at the checkout page, the final amount shown for one cylinder is 305.11gbp. it sounds too good to be true, but ive already emailed them about this so waiting for their response.

 

You're tempting me too much.. Just spent 600plus on PJME, insurance, inspection this month, tyres severely due for a change.. Cant control spending!!!

Hmm, maybe the italkit will be my June/July project.

 

I notice they dont have spare pistons and gasket sets for the Italkit, u might want to ask them if they carry it.

 

Are you interested in getting the same aftermarket forks like what Law has on his bike? :) That's the last item I need to complete my list of simple mods. Then I'll move on to my poor RVF that's crying out to me. Hehe.

[mesab0ogie]

You're tempting me too much.. Just spent 600plus on PJME, insurance, inspection this month, tyres severely due for a change.. Cant control spending!!!

Hmm, maybe the italkit will be my June/July project.

 

I notice they dont have spare pistons and gasket sets for the Italkit, u might want to ask them if they carry it.

 

Are you interested in getting the same aftermarket forks like what Law has on his bike? :) That's the last item I need to complete my list of simple mods. Then I'll move on to my poor RVF that's crying out to me. Hehe.

 

haha. i'll ask them if they carry spares. hopefully they do.

 

anyway, ur talking abt the marzocchis? 700euros way too much man. im still on stock shocks! if i had that money to spare nw id grab myself a set of ohlins first. bt they're some good stuff no doubt. lots of superteens bike use them.

[vteclee]

http://i1223.photobucket.com/albums/dd510/vteclee/burn.jpg

 

http://i1223.photobucket.com/albums/dd510/vteclee/burn2.jpg

 

pictures of my bt 090 after 2 hrs .. was running under pressure 135 ~ 20 psi.

[lacrimosae]

Question. Is the radiator really that good? Can you elaborate please?? Thanks sweetheart.

 

Well since my radiator is slightly damaged, I just want to replace it.

 

The theory is that since the Metrakit radiator is slightly larger, the cooling properties would be slightly better, especially good for commute in congested roads and traffic jams. Basically, it should dissipate heat faster and more effectively with less movement of air due to the larger surface area that the heat can transfer to.

 

Hopefully that translates to a less rise in temperature when idling in a jam.

 

I used to study hydro- and aero- dynamics, along with heat exchange capacities for interior design. The theory is solid but since I can't prove it without a proper test, I can't say for sure that having a larger radiator will promote better heat exchange.

 

It also will depend on the rate of coolant flow and the power available to move the coolant through a larger radiator.

 

For my system, where the coolant is driven by an electrical water pump so coolant is moving quickly even on idle, there may be minimal benefits.

 

But if the cooling system is dependent on a mechanically driven coolant pump, or the impeller, then there might be some benefits as the larger radiator can dissipate more heat in stagnant air (eg. when stuck in jam and air surrounding radiator is stagnant and hot) even though the coolant is being pumped through the cooling circuit slowly (based on engine speed, ie rpm).

 

the shippings 50gbp for 1, 60gbp for 2 cylinders. Its damn freaking cheap. The listed price of 300gbp is inclusive of VAT, so without VAT its only like 250gbp. thats like 40gbp cheaper than pjme man. at the checkout page, the final amount shown for one cylinder is 305.11gbp. it sounds too good to be true, but ive already emailed them about this so waiting for their response.

 

~ Drooling already!

 

haha. i'll ask them if they carry spares. hopefully they do.

 

anyway, ur talking abt the marzocchis? 700euros way too much man. im still on stock shocks! if i had that money to spare nw id grab myself a set of ohlins first. bt they're some good stuff no doubt. lots of superteens bike use them.

 

Marzocchi is one of the best makers for suspension. I use Marzs even on all my mountain bikes!

 

The forks I'm using are even customised to my weight.

 

http://i1223.photobucket.com/albums/dd510/vteclee/burn.jpg

 

http://i1223.photobucket.com/albums/dd510/vteclee/burn2.jpg

 

pictures of my bt 090 after 2 hrs .. was running under pressure 135 ~ 20 psi.

 

SWEEEEEEEEEEEEET....

[elevened]

I don't quite follow....

 

I'm assuming that since the volume of air/fuel mix entering the cylinder is fixed per stroke, if you lessen your 2T, the volume taken up by fuel would be higher, assuming the jet size remains the same, since the bore, stroke and venturi size remains the same and air volume would be the same. Thus the volume of emulsified liquid in the mix would be the variable.

 

Based on my plug chop readings and Mr Gunson (the Colotune glass spark plug), it would seem that the lower the 2T content in my A/F mixture, the richer my carburetion.

 

But I've been unchallenged for so long this theory has more or less grown roots in my mind and it's hard for me to abandon it.

 

This calls for a late night supper session to debate this over! hhahahaha...

 

Agreed!

 

Firstly, do not mistake air/fuel ratio for fuel/2T ratio.

If you're running on premix, which i believe most of us here already do, fuel and 2T come straight from your tank to your carb. (Take them together as 'fuel' when applying them to air/fuel ratio)

Adjusting your air/fuel ratio would mean increasing the amount of air and reducing both your fuel and 2T input per stroke and vice versa. (Depending on which way you turn your screw)

Reducing the amount of 2t you pour into your tank would also mean letting more fuel take up the space of the reduced 2T. (Thus Lawrence's constant reminder that putting more 2T leans out your mixture.

 

Overall it sounds kinda confusing, but it can easily be explained by a diagram.

Which also agrees with Lawrence's call for a supper debate!

 

Correct me if i am wrong, but this is what i have come to understand from my research about air/fuel and fuel/2T ratios.

 

 

err, dun remember e brand exactly but david said he'd b using a branded one starting wif A... gaskets r e original rotax ones cuz he said e budget ones dun last long...

 

From my experience, David uses FAG bearings only.

[vyruz]

pictures of my bt 090 after 2 hrs .. was running under pressure 135 ~ 20 psi.

 

Fack! Can't wait for my rubber to look like that!

[vyruz]

pictures of my bt 090 after 2 hrs .. was running under pressure 135 ~ 20 psi.

 

Fack! Can't wait for my rubber to look like that!

[personified]

http://i295.photobucket.com/albums/mm152/motopersonified/ohlinsunder.jpg

 

this will be actual position for the dampers,just below the clamps...that be idea place..mine (for those terminally green eye spastic who couldnt comprehend my post)is for adjustment on the fly for track testing...

we be looking into brackets for top mount soon,needs adjustment as our 125 top yoke is not big enuff for direct top mount n also since testing out RSV fork n twin disc is not favourable hahaha

next "for the hell of it" project will be an undertail exos,

the serious ones will be an Ohlins front fork 50mm or 52mm cartridge kit..the rads..and a 130 rear tyre if i can get my hands on 1...

Edited April 21, 2011 by personified

[personified]

http://i1223.photobucket.com/albums/dd510/vteclee/burn.jpg

 

http://i1223.photobucket.com/albums/dd510/vteclee/burn2.jpg

 

pictures of my bt 090 after 2 hrs .. was running under pressure 135 ~ 20 psi.

 

if i can see clearly thru my failing eyesight bro..theres hints of slight cold tear,meaning u didnt warm tyres up enough and started accellerating outta corners...running at 20psi is uber under pressure and only Michelins can run in that sort of pressure the others will probably overheat in few short laps causing slides at the rear and the front threatening to wash out ,in fact u can actually feel the front squirming even when just starting to ride the bike,the front will feel heavy.

its a good start,decent wear throughout.smooth riding...the acceleration wear is almost top center which means u are accellerating when bike is almost upright,next up try gassing once u lift the bike. n notice u have a chicken strip at the rear so do mine which means...??? its the wrong rear tyre size....

 

i have a pix here of 003 after 20mins tracktime..

http://i295.photobucket.com/albums/mm152/motopersonified/rstyres.jpg

[personified]

Fack! Can't wait for my rubber to look like that!

 

patience patience... its only 5 days away...:P

[mesab0ogie]

Can someone explain to me why a mixture that is too lean will cause the engine to heat up and seize?

[spark315]

Can someone explain to me why a mixture that is too lean will cause the engine to heat up and seize?

 

Hi Mesa.... i might be wrong but from my understanding... its like eating KFC.... too rich the chicken will be oily.... if too lean the chicken will be uncooked.....

 

a lean mixture has a higher ratio of o2 and subsequently the resulting combustion generates more heat up to the point of a misfire or incomplete combustion. thus this heat generation and lack of fuel actually deteriorates the piston top resulting in seizure...... i might be wrong but this is how i understand it.... maybe the gurus around can point my mistake out as well.....

[Sub Zero]

Well since my radiator is slightly damaged, I just want to replace it.

 

The theory is that since the Metrakit radiator is slightly larger, the cooling properties would be slightly better, especially good for commute in congested roads and traffic jams. Basically, it should dissipate heat faster and more effectively with less movement of air due to the larger surface area that the heat can transfer to.

 

Hopefully that translates to a less rise in temperature when idling in a jam.

 

I used to study hydro- and aero- dynamics, along with heat exchange capacities for interior design. The theory is solid but since I can't prove it without a proper test, I can't say for sure that having a larger radiator will promote better heat exchange.

 

It also will depend on the rate of coolant flow and the power available to move the coolant through a larger radiator.

 

For my system, where the coolant is driven by an electrical water pump so coolant is moving quickly even on idle, there may be minimal benefits.

 

But if the cooling system is dependent on a mechanically driven coolant pump, or the impeller, then there might be some benefits as the larger radiator can dissipate more heat in stagnant air (eg. when stuck in jam and air surrounding radiator is stagnant and hot) even though the coolant is being pumped through the cooling circuit slowly (based on engine speed, ie rpm).

 

 

Thanks Lawrence. It's just as I thought. Maybe we should customize a radiator. Sadly, no matter how nice and shiny, we cant see much of it, once it's fitted in.

 

Btw, i checked out your damper yesterday. I like the Bitubo design, and the way it's held in place by the brackets. Only minus point is you cant see your adjustment levels.

 

Personally I never had any use for a damper on our bikes, I'm not that good a rider. But I should be getting my hands on a Matris damper soon. It's sooo gorgeous.Has numbered markings to show your current settings. The Ohlins and Bitubo lack this. Only thing I dont like is it's sort of dangling when mounted, not as rigidly fixed as the Bitubo. I tried riding the bike with Ohlins damper that I mentioned to you, feels real good, but it's so huge and side mounted. Abit of an eyesore, but not as bad as others I have seen. Can vomit blood.

 

 

Interesting how the RS250s came standard with mounting point on the frame for dampers, but not the RS125.

Edited April 21, 2011 by Sub Zero

[Sub Zero]

Can someone explain to me why a mixture that is too lean will cause the engine to heat up and seize?

 

In simple terms, from what I understand, fuel/petrol serves 2 purposes in our engines. 1 is for combustion, and the other is for actually cooling the cylinder. A lean mixture results in all the fuel being used for combustion, none left whatso ever for cooling the cyclinder. Therefore, a lean mixture results in a very responsive bike, but it is prone to heating up. You can easily tell when a bike is running abit lean when you close throttle at higher RPMs, 10K onwards, and the bike jerks. This is because the cyclinder is starved of fuel.

 

Lawrence should be able to clarify.

[spark315]

just curious.... is changing to V-Force reed cage and 34mm racing carb by Dellorto with proper jetting gonna make the flatspot between 4.5 to 6.5k rpm ease off... am having difficult riding esp wen i need the power in this rpm range.....

[personified]

its done...

http://i295.photobucket.com/albums/mm152/motopersonified/ohlinsfinishedproduct.jpg

 

now for tuesday... couple of RS125s going up to PG..we be taking it easy

lets pray we dont hit any black pig cause they def vomit from impact..

I try get the vdo from Bryan n post it up... i've yet to see a vomitting pig...

[mesab0ogie]

just curious.... is changing to V-Force reed cage and 34mm racing carb by Dellorto with proper jetting gonna make the flatspot between 4.5 to 6.5k rpm ease off... am having difficult riding esp wen i need the power in this rpm range.....

 

Even if u install a polini 154 big bore, use a keihin 39mm carb, jolly moto corsa pipe, vforce 3 reeds and zeeltronic cdi ur still gona have th flat spot if ur TUNING is off. Nth to do with d hardware in ur bike really.

[vyruz]

its done...

 

now for tuesday... couple of RS125s going up to PG..we be taking it easy

lets pray we dont hit any black pig cause they def vomit from impact..

I try get the vdo from Bryan n post it up... i've yet to see a vomitting pig...

 

Looks sweet Larry.

 

Vomitting pig? Wow just reading that makes me feel queasy!

 

Tuesday can't come fast enough!

[personified]

just curious.... is changing to V-Force reed cage and 34mm racing carb by Dellorto with proper jetting gonna make the flatspot between 4.5 to 6.5k rpm ease off... am having difficult riding esp wen i need the power in this rpm range.....

 

bro..either street or track setting... hard to get the best of both world...hmmmm... now u got me into that V-Force thingy again...

[personified]

Looks sweet Larry.

 

Vomitting pig? Wow just reading that makes me feel queasy!

 

Tuesday can't come fast enough!

 

well we can do sunday as a rehearsal if u want...:P

[lacrimosae]

Agreed!

 

Firstly, do not mistake air/fuel ratio for fuel/2T ratio.

If you're running on premix, which i believe most of us here already do, fuel and 2T come straight from your tank to your carb. (Take them together as 'fuel' when applying them to air/fuel ratio)

Adjusting your air/fuel ratio would mean increasing the amount of air and reducing both your fuel and 2T input per stroke and vice versa. (Depending on which way you turn your screw)

Reducing the amount of 2t you pour into your tank would also mean letting more fuel take up the space of the reduced 2T. (Thus Lawrence's constant reminder that putting more 2T leans out your mixture.

 

Overall it sounds kinda confusing, but it can easily be explained by a diagram.

Which also agrees with Lawrence's call for a supper debate!

 

Correct me if i am wrong, but this is what i have come to understand from my research about air/fuel and fuel/2T ratios.

 

From my experience, David uses FAG bearings only.

 

Thanks for explaining it so simply and clearly.

 

Yes David uses FAG bearings only, which are quite good.

 

Thanks Lawrence. It's just as I thought. Maybe we should customize a radiator. Sadly, no matter how nice and shiny, we cant see much of it, once it's fitted in.

 

Btw, i checked out your damper yesterday. I like the Bitubo design, and the way it's held in place by the brackets. Only minus point is you cant see your adjustment levels.

 

Personally I never had any use for a damper on our bikes, I'm not that good a rider. But I should be getting my hands on a Matris damper soon. It's sooo gorgeous.Has numbered markings to show your current settings. The Ohlins and Bitubo lack this. Only thing I dont like is it's sort of dangling when mounted, not as rigidly fixed as the Bitubo. I tried riding the bike with Ohlins damper that I mentioned to you, feels real good, but it's so huge and side mounted. Abit of an eyesore, but not as bad as others I have seen. Can vomit blood.

 

Interesting how the RS250s came standard with mounting point on the frame for dampers, but not the RS125.

 

The thing is, we don't need to see the adjustment level. If I feel that my damping is too heavy, I simply release 1 click and try again. Still too heavy, one more click. After servicing, changing oil etc, the performance may vary from brand new, so don't rely on the adjustment markings, go by 'feel'.

 

In simple terms, from what I understand, fuel/petrol serves 2 purposes in our engines. 1 is for combustion, and the other is for actually cooling the cylinder. A lean mixture results in all the fuel being used for combustion, none left whatso ever for cooling the cyclinder. Therefore, a lean mixture results in a very responsive bike, but it is prone to heating up. You can easily tell when a bike is running abit lean when you close throttle at higher RPMs, 10K onwards, and the bike jerks. This is because the cyclinder is starved of fuel.

 

Lawrence should be able to clarify.

 

Thanks for paying attention during class, Vik. Very good student lah you.... hahahaha

 

Now you can share with the rest of the class about carburetion and tuning also... Save me some time...

 

Yes, for 2-strokes fuel is used as a cooling agent as well as for combustion. I was running too lean before my last rejetting that my spark plug was completely clean! Which is really really bad.

 

Too lean, all fuel used for combustion, none left for cooling, everything expands beyond design engineering parameters, and BAM! Seizure.

Tolerances are tight so too much expansion is bad.

 

No amount of lubrication will save you from a lean seizure.

 

its done...

http://i295.photobucket.com/albums/mm152/motopersonified/ohlinsfinishedproduct.jpg

 

now for tuesday... couple of RS125s going up to PG..we be taking it easy

lets pray we dont hit any black pig cause they def vomit from impact..

I try get the vdo from Bryan n post it up... i've yet to see a vomitting pig...

 

At least this looks nice. Still not the prettiest set up but from what I have seen, track oriented bikes are usually more functional than aesthetically pleasing. heh heh...

 

Remember to stay in front of me so if anyone is going to hit a black pig it will be you, not me! hahahaha

[spark315]

Even if u install a polini 154 big bore, use a keihin 39mm carb, jolly moto corsa pipe, vforce 3 reeds and zeeltronic cdi ur still gona have th flat spot if ur TUNING is off. Nth to do with d hardware in ur bike really.

 

 

 

thx mate for the advice.... time to see the RS doctor.....

[spark315]

bro..either street or track setting... hard to get the best of both world...hmmmm... now u got me into that V-Force thingy again...

 

get one la bro..... we experiment only wat..... u may neva know.... it may keep you out of reach from me the whole track sessions.....