DNA180 corner

[Sesshou]

Originally posted by specialc@Jul 1 2006, 01:15 AM

The GPR is just solid. After I put on the exhaust, I have received 5 thumbs up at lights from admirers in cars. However those dudes in X1s, Sonics and Waves don't really like my bike...they love to gun beside me....sigh....

hi specialc ,

 

 

how's the gpr exhaust .... need any jet changing?

[Sesshou]

stroker,

 

 

like to get some carb tuning spec. from you . When you using the PHF34 with open pod , what main jet and pilot jet size you are using and the needle jet ..... is it the bleed type or primary type ?

 

want to get some rough guide lines b4 start to DIY.

 

 

Thanks

[specialc]

Originally posted by Hikaru@Jul 1 2006, 03:43 PM

hi specialc ,

 

 

how's the gpr exhaust .... need any jet changing?

Win Jing slapped it on and asked me to try first.... so far don't seemed like I need any jetting as it runs fine..... super duper loud....

[spy622]

Originally posted by stroker@Jun 30 2006, 09:41 PM

bro.. phew.. I finally know what's the strange whinning sound's about... KNN. At a cost. F man....

 

Went pg happily early morning. Reached there, got side stand out, changed pipe, and setted the carb a few rounds. Got it to run SWEET with my pwk34. Time comes for the track time... First & second lap warming up. All's good. Bike pulled well. Except the sprocket still too tall. Third to fifth lap beginning to pick up pace. Full bore at the 2nd straight, backed one gear to set up for the left hander and suddenly something went wrong.. There seemed to be a grinding sound coming from bottom end. Confirmed troubled as I cruised to the track side. Crankshaft was like on a grinder.. Vibrating and grinding like a 1950's fruit blender.

 

KNN. Crankshaft high speed bearing seized. Rebuit the bottom-end, changed conrod, new high speed bearings, etc etc etc etc etc for the rest of the day... sianxzsczxz... :sian:

Kao I almost wanna go on friday morning man...but end up slping instead.

Lucky u didnt had to go thru much trouble re-conditioning ur crank unlike me

[stroker]

Originally posted by specialc@Jul 1 2006, 01:13 AM

Could it be oil pressure? And also oil used? If there's oil starvation problem causing low pressure and oil not suitable, your rebuilt will come to nothing, bro... better check everything properly else waste a lot of $$$. Anyway, u got the $ already?

Don't think anything to do with the lubrication or oil. I'll pay attention in this area perhaps.

 

Its actually the new bearing itself. Its already whinning right after the rebuild. Prior to the rebuild, it was running fine even in excess of 12,000rpm. This time round I was being conservative, and was just doing a cap of 11,000rpm.

 

Dropped the engine 3 times in 2 weeks.. :sweat:

 

PS: Got the money and spent it liao lor.. haha.

[stroker]

Originally posted by specialc@Jul 1 2006, 07:17 PM

Win Jing slapped it on and asked me to try first.... so far don't seemed like I need any jetting as it runs fine..... super duper loud....

Bro, you NEED to re-jet yr carbby. The backfiring is cos of yr ppilot jet being too lean. Increase it and you'll experience smoother riding, better throttle response, cured backfiring etc etc..

 

I did not use stock carb for long.. So I can't quite recc the proper size for it.. But my niterider78 on his vx used a pilot jet of 38 (if I rem correctly) with success. You have to bump up yr pilot jet dude! Trust me on that.

 

Cheers!!~

[stroker]

Originally posted by Hikaru@Jul 1 2006, 03:56 PM

stroker,

 

 

like to get some carb tuning spec. from you . When you using the PHF34 with open pod , what main jet and pilot jet size you are using and the needle jet ..... is it the bleed type or primary type ?

 

want to get some rough guide lines b4 start to DIY.

 

 

Thanks

Bro, what mod you running now? I need to know the complete mod details.. My setting won't work with yours. Cos the jetting I started (with little mods to the rest of my bike) defers alot as compared to the eventual setting I used.. You lemme know yr bike's mods then prolly can recc you something..

 

Anyway, I dunno if I can recall.. Will try my best.. Cos I've given away my jetting notes to the dude whom I sold the phf34 to. It was quite detailed even the accelerator pump jet was tweaked.

 

PS the jets the carb came with WONT work on stock/ mildly tuned scoots. The bog will bog itself to hell. Cheers!!~~

[stroker]

Originally posted by spy622@Jul 1 2006, 07:56 PM

Kao I almost wanna go on friday morning man...but end up slping instead.

Lucky u didnt had to go thru much trouble re-conditioning ur crank unlike me

Wanted to jio you.. But it was very last min thingy.. SO paiseh to jio you in such short notice.. Next time. Cheers dude!

[danielburgess]

Just got back from changing the belt, apparently, it feels alot better, but not getting the top end I expected. The guy who did the bike for me says it is the clutch slipping and not really the belt. How much is a malossi clutch?

 

Cheers...

[Sesshou]

Originally posted by stroker@Jul 2 2006, 03:50 PM

Bro, what mod you running now? I need to know the complete mod details.. My setting won't work with yours. Cos the jetting I started (with little mods to the rest of my bike) defers alot as compared to the eventual setting I used.. You lemme know yr bike's mods then prolly can recc you something..

 

Anyway, I dunno if I can recall.. Will try my best.. Cos I've given away my jetting notes to the dude whom I sold the phf34 to. It was quite detailed even the accelerator pump jet was tweaked.

 

PS the jets the carb came with WONT work on stock/ mildly tuned scoots. The bog will bog itself to hell. Cheers!!~~

my bike will be running with a mikuni vm34 , gpr full system and cdi . i intend to run the carb on stock airbox. the stock main jet comes with the carb is 260 ....way too big . and the stock needle jet is a primary type . i intend to run it on a 120 main and a 35 pilot ..... ( need to know roughly what main jet size and pilot jets to buy b4 start installation)

[spy622]

Originally posted by danielburgess@Jul 2 2006, 05:52 PM

Just got back from changing the belt, apparently, it feels alot better, but not getting the top end I expected. The guy who did the bike for me says it is the clutch slipping and not really the belt. How much is a malossi clutch?

 

Cheers...

u might like to check n change the clutch springs n take a look if ur clutch bell is warp b4 deciding to switch to a adjustable aftmkt clutch...

 

another thing to note which I dun tink might effect u as ur ride is still new is the wear an tear of the pulleys which might casue the belt to slip instead

[specialc]

Originally posted by stroker@Jul 2 2006, 03:44 PM

Bro, you NEED to re-jet yr carbby. The backfiring is cos of yr ppilot jet being too lean. Increase it and you'll experience smoother riding, better throttle response, cured backfiring etc etc..

 

I did not use stock carb for long.. So I can't quite recc the proper size for it.. But my niterider78 on his vx used a pilot jet of 38 (if I rem correctly) with success. You have to bump up yr pilot jet dude! Trust me on that.

 

Cheers!!~

Bro, I sort of like the backfiring whahahha.....like damn fierce! Ok who is a good person that can do re-jetting? Des like super busy....

[jedition]

hey guys.. do u guys know where can i get this DNA runner?? i thought of buying this bike for quite some time already.. but i dunno where to get.. is there any 1st hand on the market??

[stroker]

jedition>> No new DNAs on the road already.. You might wanna ask these guys here if they wanna sell off theirs.

 

Cheers~!

[stroker]

Originally posted by danielburgess@Jul 2 2006, 05:52 PM

Just got back from changing the belt, apparently, it feels alot better, but not getting the top end I expected. The guy who did the bike for me says it is the clutch slipping and not really the belt. How much is a malossi clutch?

 

Cheers...

I don't think too that its the clutch.. Well its just me.. What do I know Malossi delta clutch ard $270 incl installation. But Im sure you can get cheaper ones right??

[jedition]

thanx bro stroke.. but do u noe whats the raft height and weight of this bike??

[stroker]

Originally posted by specialc@Jul 3 2006, 11:45 AM

Bro, I sort of like the backfiring whahahha.....like damn fierce! Ok who is a good person that can do re-jetting? Des like super busy....

Spiderman??? :cheer:

[stroker]

Ermmmmm... I dunno off-hand leh.. I sold my dna already, so my user manual not wit me. But I think its been covered in the first few pages of this thread ba..

 

Guys anyone knows some figures?

[stroker]

Originally posted by Hikaru@Jul 2 2006, 05:58 PM

my bike will be running with a mikuni vm34 , gpr full system and cdi . i intend to run the carb on stock airbox. the stock main jet comes with the carb is 260 ....way too big . and the stock needle jet is a primary type . i intend to run it on a 120 main and a 35 pilot ..... ( need to know roughly what main jet size and pilot jets to buy b4 start installation)

Bro, my jetting will defer VERY greatly as compared to yours.. Cos diff carb and jetting system all together.. Its like comparing duck and chicken.

 

So I don't think I can offer much. But prolly I think you'll need a really small pilot jet. Main 120+++ should be fine. YOU'LL HAVE to get yourself many many more jets in the process. Your setup still very standard leh.. The gpr won't upset yr jetting alot (with the exception to a slightly bigger pilot). So your jettings should be very similar to jetting it for a stocker. And 34 seems a little too big for a stock-ish bike. So will tend to bog much. Using airbox helps (if it fits). CDI doen't affect yr jetting much.. Only at the midrange, tend to make it run leaner. Dunno what's the reason for this too..

 

My recc is taking out the baffle of the gpr. Bump up the pilot much more, and get some super good throttle response.

 

CDI is useful now you have a big carb. Cos you'll be constantly hitting the rev-limiter. With the rev-limiter out, you can rev higher and a higher top. You can use heavier weights/ and or gear up to harness the extra revs for even more top. But I wont rec doing it cos it kills yr bottom end.

 

No shortcut unless you're using a phf34, then I can share some jetting setups wit u.

 

cheers man.

[danielburgess]

If you want to get your jetting done, can always try Desmond. Anyway, my setup is a 115 main, and a 38 pilot, but I feel the pilot can go up a little more as there is still a slight back fire once in a while.

 

Thanks spy662 for the advise! I am going to get it checked out.

 

Anyone keen on a little touring on the 28th-30th July? Cause I was thinking of a little trip up into Malaysia. Somewhere not too far. Maybe Desaru or something. Stay a night somewhere. Lemme post up a little response slip, see who is keen!

 

Cheers...

 

28th-30th trip into Malaysia

=================

1) Daniel Burgess

[specialc]

Originally posted by jedition@Jul 3 2006, 01:11 PM

thanx bro stroke.. but do u noe whats the raft height and weight of this bike??

Saddle Height is 780mm.

Weight Dry is 125kg.

[stroker]

:thumb:

[Sesshou]

fix my exhaust today..... bike running ok but there is once in awhile back firing .... next the carb. Just like to know does the stock walbro carb have a air screw adjustment? And how to you do a plug chop on a auto scoot...... run to top speed then just turn off the engine ?

[Sesshou]

Originally posted by stroker@Jul 3 2006, 01:38 PM

Bro, my jetting will defer VERY greatly as compared to yours.. Cos diff carb and jetting system all together.. Its like comparing duck and chicken.

 

So I don't think I can offer much. But prolly I think you'll need a really small pilot jet. Main 120+++ should be fine. YOU'LL HAVE to get yourself many many more jets in the process. Your setup still very standard leh.. The gpr won't upset yr jetting alot (with the exception to a slightly bigger pilot). So your jettings should be very similar to jetting it for a stocker. And 34 seems a little too big for a stock-ish bike. So will tend to bog much. Using airbox helps (if it fits). CDI doen't affect yr jetting much.. Only at the midrange, tend to make it run leaner. Dunno what's the reason for this too..

 

My recc is taking out the baffle of the gpr. Bump up the pilot much more, and get some super good throttle response.

 

CDI is useful now you have a big carb. Cos you'll be constantly hitting the rev-limiter. With the rev-limiter out, you can rev higher and a higher top. You can use heavier weights/ and or gear up to harness the extra revs for even more top. But I wont rec doing it cos it kills yr bottom end.

 

No shortcut unless you're using a phf34, then I can share some jetting setups wit u.

 

cheers man.

thanks any way........ by turning the air screw in will also make the pilot circuit richer ?

[spiderman]

Originally posted by stroker@Jul 3 2006, 01:12 PM

Spiderman??? :cheer:

its 4stroke man... u have better experience in this... somemore is there pilot jets for our carb?

 

 

Your 125z crankshaft high speed bearing is it ceramic? for all i know that the bearings on the crankshaft should put back bearings specially designed for 2 strokes... read in some books about it... maybe thats y it seized man...