Still getting vibration on TS1 225
Posted: Sun Jul 26, 2009 11:40 pm
On the old site I mentioned I was getting bad vibration
After twisting camlam crank awhile back, I replaced crank with MB Alpha crank and lightened flywheel (2kg).
Whilst taking it easy to bed the crank, vibration was a big problem. I had made sure that engine mounts were not over tightened, swapped sundance grips, etc. I had also replaced engine mount cones to eccentric as manifold just touched the frame unseated, just to make sure.
Problem still present
The problem was not present before twisting camlam crank, so process of elimination.
Changed flywheel to heavier flywheel (short fin), vibration was reduced but not rectified. Fearing that this second crank maybe out of alignment, stripped scoot.
Crank was checked by an engineer who builds 2-stroke cranks who said the webs are out by 2 thou of an inch, but he said that is within tolerance and the conrod is running true.
So I am frustrated in knowing what this vibration could be. With the lightened flywheel fitted rode 40 miles and found that 2 wires had vibrated loose from rectifier. Even with heavy flywheel getting pins and needles in hands after 10 miles
Any ideas will be greatly appreciated
After twisting camlam crank awhile back, I replaced crank with MB Alpha crank and lightened flywheel (2kg).
Whilst taking it easy to bed the crank, vibration was a big problem. I had made sure that engine mounts were not over tightened, swapped sundance grips, etc. I had also replaced engine mount cones to eccentric as manifold just touched the frame unseated, just to make sure.
Problem still present
The problem was not present before twisting camlam crank, so process of elimination.
Changed flywheel to heavier flywheel (short fin), vibration was reduced but not rectified. Fearing that this second crank maybe out of alignment, stripped scoot.
Crank was checked by an engineer who builds 2-stroke cranks who said the webs are out by 2 thou of an inch, but he said that is within tolerance and the conrod is running true.
So I am frustrated in knowing what this vibration could be. With the lightened flywheel fitted rode 40 miles and found that 2 wires had vibrated loose from rectifier. Even with heavy flywheel getting pins and needles in hands after 10 miles
Any ideas will be greatly appreciated
, only asking because you would still think its the crank. I,ve only twisted 1 before and you could see a eccentric movment on the flywheel when you pressed down on the kickstart,the web,s had also moved off the pin, is there a gap between the webs and the casing, might be worth taking the flywheel cowl off to check for the eccentric movment first, good luck with it and let us know when you sort it.