seat vibration

jayjmarlo

New Member
Local time
12:54 PM
Joined
Dec 1, 2012
Messages
22
My seat seems to be vibrating a little too much to comfortably ride long distances at full throttle. It seems to have gotten worse recently. Any idea how I could figure out where it is coming from? The engine mounts are solid I wrapped the frame in thick leather under the mounting hardware. I'm running the Chinese 66cc 2 stroke on a mountain bike.
 
if you have a quality made chromoly steel bike frame, they can be very stiff, and you may have to learn to live with the vibration. Aluminum frames can also be very stiff. The steel frames made from thicker, lower grade, tensile steel seem to absorb vibration better.
You may be able to try a suspension seatpost to damp the vibration.
 
Fix the source of the problem instead of trying to cope with it.
Use a lighter weight wrist pin and get a CDI that retards the spark at high rpm.
Click on my signature link to read all about it.
 
The steel frames made from thicker, lower grade, tensile steel seem to absorb vibration better.

I completely agree because my next door neighbour has motorized an old lower spec steel framed bike and the vibration levels are massively reduced over my bike which has an aluminium frame; and we both have identical engines.

I've tried to get a specialist bespoke frame maker who only works with heavy section crome molly round tubing to copy the design of the GT LTS but incorporate disk brake mounts.
Unfortunately he had a heart attack when looking at the rear suspension linkage system and flatly refused to take on my project, which was disheartening as i principally wanted the vibration reducing qualities of steel.
 
My seat seems to be vibrating a little too much to comfortably ride long distances at full throttle.

don't worry, if you keep riding at full throttle the vibration will go away as soon as the bottom end bearings blow out (think putting your car in first gear and driving with the gas to the floor everywhere you go)

when riding, look for a 'sweet spot' in sound & vibration at about 2/3 of top speed - that's your cruising speed
 
don't worry, if you keep riding at full throttle the vibration will go away as soon as the bottom end bearings blow out (think putting your car in first gear and driving with the gas to the floor everywhere you go)

when riding, look for a 'sweet spot' in sound & vibration at about 2/3 of top speed - that's your cruising speed

Makes since, do you all mostly cruise at 2/3 throttle for long distance rides?
 
depends on the bike as to exactly where the sweet spot is - when it starts to get too loud or vibrate too much, drop the throttle back just a bit

you can get thousands of miles out of it if you treat it well - just a few months if you don't
 
At what speed do the vibrations get bad? Maybe you can simply get a smaller rear sprocket to reduce engine rpm (and vibration) at your cruise speed.
 
god, someone please remove me from this iseless conversation.
Would any of you accommodate a bee if it was buzzing around inside your car? Hell no, you would stop and let it out. You would solve the problem. You wouldn't run inside to make a bowl of sugar water to set inside the car to placate the bee.
Fix the problem (which isn't the frame or the motor mounts)!!!
what crap most of ya'll put up with. it totally amazes me. a little effort and a little beer money solves these little problems.
 
I love your sense of humor!
( y'alls bowl of sugar water):D
Keep 'em comming!
Seriously though, how else can you convey the same message repeatedly?
( well humor works for me! )
 
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