how hard is it to get some acceleration?

hello all i have got a yamaha aerox with a leo vince tt pipe upjetted uprated reeds 12mm carb stage 6 varitor running standard clutch with some uprated green springs on with 7.0 gram rollers and it bearly moves i just want good and smooth acceleration help!

 

The rollers are way to heavy.

You should be down at around 4-5 grams.

 

Yh def , my runners got 9 gram rollers , 7 is way to heqvy for ur fiddy

 

17.5mm carb will help a lot aswell, but first get some 4.5g rollers.

 

well what color clutch springs are best to run with my 4.3 gram rollers because when i was running some yellow ones with 4.3 it just revved really high and didnt move very quickly at all so if i put the yellow springs in know with 7 gram rollers will it be alot better becasue at the minute i am running green clutch springs

 

Eh?

We've already said 7g rollers won't help at all!

Stop pissing about - get 4.5g rollers and fit whatever springs are slightly stiffer than standard....talking about colours doesn't help becuase different colours stand for different stiffnesses between manufacturers.

Yes it will rev highly but that where the extra power is.

If you don't want to rev high put the bike back to standard and live with 3 bhp.

 

drop the roller weight down to atleast 5g and try that first before changing the clutch springs you dont need to change the springs when running a expansion pipe yes you should to get the full potential but its not a must all they do is change when the clutch engages to a higher rpm. You will still have the same performance once its moving its just the set off thats affected i prefere to run standard clutch springs so its not as noisy setting of at every junction

 

i am thinking about getting a 70 cc kit what does everyone think?

 

im not being funny or anything but if you aint going to take advice from these above, you prob wont listen to advice we give you about 70s bbk, first have you dropped rollers in weight now??

 

yes i am now running 5 gram rollers with yellow clutch springs and its fine

 

That's good news, now if you wan't reliable performance fit a stage 6 streetrace 70cc kit, a 17.5 or 19mm carb and the fun really starts.

 

how quick will i be going

 

Around 70mph

 

will do 60-65 on flat not 70

 

want that sort of speed then get 70s 21mm carb and gear up kit

 

you only need a 21mm carb on a high spec 70 kit, a sport kit like the stage 6 streetrace performs just as well on a 19mm, it also doesn't need a gear up kit because unlike the other sports kits it holds on to it's power until 11000 revs before tailing off. The only drawback is that they place more stress on the crank. I would rather spend a few extra quid on a better crank than a gear up kit Also you don't spend that much time at the top end and it's good to know that you have a strong motor.

 

My Aerox was clocked by my mates sat nav, he was doing 65mph and I was pulling away from him with a bit left.
So 70 is easilly possible with the correct setup.

 

not with just 70s.. you maybe if you have bigger carb on and set up correctly

 

My aerox has a top racing (doppler crank) stage 6 streetrace 70cckit, stage 6 sport pro replica exhaust, dellorto 17.5 carb, pollini reads and variator and a properly set up clutch.

It can reach a higher top speed than most 70 sport kits because it holds on to it's maximum power all the way to 11000 revs. Have a look at the comparison chart on the Pedparts site and you will see what I mean. Most sport kits produce maximum power in a narrow band around 9500 revs, they will continue revving but the power drops off rapidly while the streetrace is still producing maximum power and able to keep accelerating.
On most peds 3.5g rollers hold the revs at 9500 which is peak power for most kits this is at about 55mph with standard gearing and to accelerate past this you need to keep up the power. It is at this point that most kits start losing power so they have difficulty going past this speed. the gear up kit compensates for this and allows a higher top speed but may slightly affect acceleration. On the otherhand at 9500 revs the streetrace still has 1500 revs of full power left so it can keep accelerating past the point where the gearing is at its maximum.
Thats why it's important to have a race crank with the streetrace and a gear up kit with the others as at 11000 revs it is producing about 2hp more than the others..

I spent a lot of time studying Pedparts results before setting up my bike, my only doubt is whether I should have fitted a 19mm carb