2 questions

[memeselfi]

ive got an 08 zuma with the next r pipe. everything is stock except for throtle mod. i have left the exhaust box on the transmission on(its got its own air filter, so i just disconnected from pipe and let it add more fresh air to the airbox).

first ?: when im at a stop and apply the rear brake there is noticeable vibration, wtf?

i noticed this on the way to get new rollers.

so i installed the new rollers (4.5 grams) its running pretty darn well, rocket accel from 10 to 37 or so. ive lost some speed on the top end(a ez trade as it took about 3 blocks to get up to 45 mph b4 the new rollers and totaly died on hills). i'm thinking a 5 or 5.5 will fix me up.

today, when i took it out, i noticed it ran better until i hit the wall at 37mph or so if i didnt give it full gas. it did help to give it full gas to climb hills or creep up to top speed.

2nd ?: is this a air/fuel problem? too much/little air? too much/not enough gas(rejet)?

[cstraubs]

The Vibration issue is normal....your rear brake shoes are basically transfering more motor vibrations through the chassis.


Can't help you on the second issue..sorry...

[burnt_toast]

The vibration with rear brakes applies is normal, all scoots I've ridden do this, like explained above.

And what exactly is your seocnd issue?? That your top speed is lower? Hard to tell what your asking

[memeselfi]

im wondering why its boging down with full thottle.