Need help with Gear Change

[triumsg]

Need help frm the bros here. I have a '02 CB750 .. is similar to the Super4.

When i change from 1st to 2nd gear at low speed (like 20 - 40 kmh) it goes into 2nd gear with a normal sounding "tug" sound.

 

If i rev a bit and change at a higher speed (above 40 - 60), it does not go in smoothly ... "tak-tak-tak" sound before going in. But at high speed, if i shift from 1 to neutral and 2 in steps is again normal sound.

 

Is this normal?? How to fix this?? i tried different engine oils is still not much better alto normal non-syn oil seems to be better Changed cluch cable also.

 

Tks for help.

[xiaowen]

had never see this problem before.

have you try playing with your bitting point. try to put it far abit?

[triumsg]

I did bro .. no use. Some pple say is the gears .. i hope not a gearbox problem.

[aixin]

Need help frm the bros here. I have a '02 CB750 .. is similar to the Super4.

When i change from 1st to 2nd gear at low speed (like 20 - 40 kmh) it goes into 2nd gear with a normal sounding "tug" sound.

 

If i rev a bit and change at a higher speed (above 40 - 60), it does not go in smoothly ... "tak-tak-tak" sound before going in. But at high speed, if i shift from 1 to neutral and 2 in steps is again normal sound.

 

Is this normal?? How to fix this?? i tried different engine oils is still not much better alto normal non-syn oil seems to be better Changed cluch cable also.

 

Tks for help.

 

U may wish to try X-1R addictive-sort of friction eliminator - search Ah Pek and X-1R for more details

[triumsg]

Thanks Aixin. But im looking for a long-term solution.

 

Anyone can recommend a reliable n professional mechanic or gear expert who can help?

[bigboystoys]

I ride an S4 and my clutch biting point used to very high. I didn't like this and so I adjusted it lower (just before my lever bottoms out against the handle bar). Initially, it was good and there was no problems.

 

However, after a few months of riding, I find it harder to shift gears when I fully clutch in. At first I thought it's just my bike needing oil change but I realised that the biting point has dropped even lower which is baffling because as clutch plates wear out, the biting point should go even higher.

 

I guessed that it's probably due to wear/tear and also extension of the clutch cable resulting in insufficient clutch stroke to fully clutch-in. So what I did was to re-adjust the clutch biting point higher.

 

I don't like going to mechanics. It's not their bike and they usually suggest the easiest way out and ask you replace everything that is remotely related to the problem.

 

 

Try and let us know.

 

Thanks

[bernardk]

Hi,

Firstly where does the sound comes from? Top of crankcase or engine block?

You can roughly knw where the sound produce from. (Determine where the sound come from can narrow the scope of the prob. Now here your explaination is still abit too wide for us to comment.)

 

Secondly have you consult your mechanic on the problem. (If you have a trustworthy mech that doesnt carrot you. If you want recommendation i can help you.)

 

Thirdly how long you own the bike? Or is it newly brought from owner or shop. (If possible if its new try to get the previous owner to own up wat is actually wrong with the bike since you already bought it.)

[aixin]

Hi,

Firstly where does the sound comes from? Top of crankcase or engine block?

You can roughly knw where the sound produce from. (Determine where the sound come from can narrow the scope of the prob. Now here your explaination is still abit too wide for us to comment.)

 

Secondly have you consult your mechanic on the problem. (If you have a trustworthy mech that doesnt carrot you. If you want recommendation i can help you.)

 

Thirdly how long you own the bike? Or is it newly brought from owner or shop. (If possible if its new try to get the previous owner to own up wat is actually wrong with the bike since you already bought it.)

 

 

Hi triumsg,

Biting-point adjustment as pointed out above also worth a try.

Engine oil also a good consideration.

Too old liao, change clutch plate.

If still produce good power, be peace of mind and ignore the Tug sounds, shouldn't let it disturb yr joys.

Normally road users can't hear this sounds as their window is wind up, or they feel is normal that only "powerful bike" produces it. Besides, there isn't anything to cushion off this Tug sounds like big engine cover. Naturally, this sounds will "leak" out more strongly.

Bikers, mesmerised in their own biking sweetness, no time to border yr Tug sounds.

 

Ears and sound are causes that beget perception of sound. Is this perception created and conditioned by the ears or by the sound? If it is created by the ears, this organ, in the absence of both disturbance and stilness, does not discern anthing and is, therefore, devoid of objects; if it cannot discern, how can it create perception? Assuming that hearing begets perception by the ears, since no hearing occurs in the absence of both disturbance and stillness, how can the ear form unite with external objects to produce perception and where can the latter's field be? If it is created by sound, that is if it depends solely on sound, then it should have no relation to yr hearing. But if hearing ceases, there will be no sound. Now, assuming that it is really created by sound and that sound exist becos of hearing, then yr hearing of sound should be perceived by the ears. If this sound is not perceived, it would have no relation with the realm of ear-perception. On the other hand, if it is heard, it is already sound, and since it is hearing's object, it cannot discern anthing; then who knows the perception? If there is no such knower, you will be like grass and plants. There cannot be a mixing of sound and hearing to create between them an intermediate realm (of perception by the ear) for such a realm cannot be at the center, in the inner organ, or in the outer sound. Therefore, neither ears not sound exist as causes, not perception by the ear (as effect) and ears, sound and its field are neith causal nor conditional, nor self-exitent.

[triumsg]

Thanks BBtoys, Bernard & Aixin.

 

BBtoys - Just had the clutch cable replaced and readjusted by Honda (BoonS), no use.

 

Bernard - sounds from the top ... not in touch with former owner ...

 

If any of you guys are free, dont mind letting you try my bike. The sound only appears when I revv a bit harder and try to shift into 2nd gear ... result is a tak-tak tak sound before going in. If I revv and bit and shift to neutral and then to 2, step by step, no sound at all. Other gears always no sound and is smooth. Up to now what I try and do is shift to 2nd without revving, at low speed. Goes in smooth without sound.

 

I fully agree with you. I dont mind paying to have it fixed but I dont want to replace one part and then find that the problem still is still there. So far, been going to BoonS for servicing. Any reliable mechanics that you guys can recommend?

[aixin]

Thanks BBtoys, Bernard & Aixin.

 

BBtoys - Just had the clutch cable replaced and readjusted by Honda (BoonS), no use.

 

Bernard - sounds from the top ... not in touch with former owner ...

 

If any of you guys are free, dont mind letting you try my bike. The sound only appears when I revv a bit harder and try to shift into 2nd gear ... result is a tak-tak tak sound before going in. If I revv and bit and shift to neutral and then to 2, step by step, no sound at all. Other gears always no sound and is smooth. Up to now what I try and do is shift to 2nd without revving, at low speed. Goes in smooth without sound.

 

I fully agree with you. I dont mind paying to have it fixed but I dont want to replace one part and then find that the problem still is still there. So far, been going to BoonS for servicing. Any reliable mechanics that you guys can recommend?

 

You got best of both world for not revvinggg, from gear one to gear two..yr bike is not created for revving at low gear, and need not have to rev at all...LOL, u r safe rider with this great bike, congratulation:cheer:

[bigboystoys]

Forgot to ask you if the shifting sound is there all along or did it just build up after few months of riding?

If it's there all the time, I'd think it could be due to incorrect shifting time.

 

For me, I upshift clutchless all the time (including 1st to 2nd). From 2nd gear upwards, I can more or less upshift seamlessly. The trickiest is from 1st to 2nd. Timed correctly, it'll be seamless.

 

Again, if we're talking about your shifting sound being there all along, could it have been caused by a mistimed upshift? With that, I mean if you clutched in and waited a tad too long, the dog gears of the gearbox would have missed the 'free from engagement' window period and if you tried to shift when it is engaged, you'll get some sort of sound. If you're in the 'free from engagement' window period, it'll slide from 1st to 2nd seamlessly.

 

Realise that I shouldn't ramble on because I seriously don't know all the circumstances of your bike and don't want to mislead you to believe of a non existent problem nor ignore a potentially expensive problem.

 

Nevertheless, please let us know how you solve it. We can all learn from there.

 

Cheers bro.

[triumsg]

Thanks. Im experimenting with Motul 10w-40 semi-syn now. Will then try a thicker mineral 20w-50 to see if that helps. Seems like it prefers mineral.

[s4revo]

Used Maxima 15W50 Fully syn if its the EO issue. It should help you solve the probs. Try it then see how. Use it for a while first to let your bike get use to it. You stay near where? Maybe I can help.

PM me if you need help and stays near hougang area.

[IvikaRazI]

From the sound of your problem, its seems to be timing problem ( your timing when clutch in & engage gear).

 

I guess thicker EO might help in your situation. Try to adjust to the bike. Try kicking hard when your are chaging gear. The tatk-tak-tak sound comes becoz you did not full kick up the gear.

[bernardk]

Bernard - sounds from the top ... not in touch with former owner ...

 

As if from above it could be tap-pad or timing chain. Erm if you need assistance on mech you can contact Freddie Tan from Fast Track. I had similar prob but i dunno if yours and mine is the same. But i had let him service and ride there for him to comment. He is a nice guy. Address: Cyclelink fasttrack Freddie Tan. Block 1044 Eunos Avenue 4 #01-143 Singapore 409794. Tel: 6749 1002 & 6749 3447

 

Dun worry im not doing sales for him just that i kinna like his service. He is really very good, you can ride to him for another opinion.

 

Freddie is qualified and certified in all major motor brand industries from japan. He got all his vert from japan.

[bernardk]

 

Hi triumsg,

Biting-point adjustment as pointed out above also worth a try.

Engine oil also a good consideration.

Too old liao, change clutch plate.

If still produce good power, be peace of mind and ignore the Tug sounds, shouldn't let it disturb yr joys.

Normally road users can't hear this sounds as their window is wind up, or they feel is normal that only "powerful bike" produces it. Besides, there isn't anything to cushion off this Tug sounds like big engine cover. Naturally, this sounds will "leak" out more strongly.

Bikers, mesmerised in their own biking sweetness, no time to border yr Tug sounds.

 

Ears and sound are causes that beget perception of sound. Is this perception created and conditioned by the ears or by the sound? If it is created by the ears, this organ, in the absence of both disturbance and stilness, does not discern anthing and is, therefore, devoid of objects; if it cannot discern, how can it create perception? Assuming that hearing begets perception by the ears, since no hearing occurs in the absence of both disturbance and stillness, how can the ear form unite with external objects to produce perception and where can the latter's field be? If it is created by sound, that is if it depends solely on sound, then it should have no relation to yr hearing. But if hearing ceases, there will be no sound. Now, assuming that it is really created by sound and that sound exist becos of hearing, then yr hearing of sound should be perceived by the ears. If this sound is not perceived, it would have no relation with the realm of ear-perception. On the other hand, if it is heard, it is already sound, and since it is hearing's object, it cannot discern anthing; then who knows the perception? If there is no such knower, you will be like grass and plants. There cannot be a mixing of sound and hearing to create between them an intermediate realm (of perception by the ear) for such a realm cannot be at the center, in the inner organ, or in the outer sound. Therefore, neither ears not sound exist as causes, not perception by the ear (as effect) and ears, sound and its field are neith causal nor conditional, nor self-exitent.

 

Too chim dun understand....

[aixin]

From the sound of your problem, its seems to be timing problem ( your timing when clutch in & engage gear).

 

I guess thicker EO might help in your situation. Try to adjust to the bike. Try kicking hard when your are chaging gear. The tatk-tak-tak sound comes becoz you did not full kick up the gear.

 

Worth a try - as pointed earlier

i tried different engine oils is still not much better alto normal non-syn oil seems to be better

 

If I revv and bit and shift to neutral and then to 2, step by step, no sound at all. Other gears always no sound and is smooth. Up to now what I try and do is shift to 2nd without revving, at low speed. Goes in smooth without sound.

 

Just follow the above that does not produce sound and is smooth,

[triumsg]

Tks Bernard. Will visit Freddy soon and will update.