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Flywheel on the move
Posted: Sat Sep 12, 2015 9:27 am
by Den 08
just wondering if is this normal, just fitted an m-tech, set at 25degrees retards back to about
17ish at about 7500 all looks ok with the strobe, not really sure if the jetting will need looking at yet
haven't been out on it, but whilst strobing at high revs I noticed that the flywheel seems to move out from mag
housing by a couple of mm is this centrifugal force in action or will this be something else!
when stopped there doesn't seem to be any play in bearings.
any thoughts please
Re: Flywheel on the move
Posted: Sat Sep 12, 2015 9:47 am
by bristolmod
1) Flywheel loose on crank- try lapping in / tightening nut
2) Flywheel AND crank moving towards mag side- front sprocket bolt loose/ not torqued down correctly??
Sorry- clutching at straws here- what ever it is it needs stripping down and investigating fairly urgently.
Chris
Re: Flywheel on the move
Posted: Sat Sep 12, 2015 10:32 am
by Den 08
bristolmod wrote:1) Flywheel loose on crank- try lapping in / tightening nut
2) Flywheel AND crank moving towards mag side- front sprocket bolt loose/ not torqued down correctly??
Sorry- clutching at straws here- what ever it is it needs stripping down and investigating fairly urgently.
Chris
I was thinking the same Chris haven't had it apart for a few years, was kidding myself that It might be normal
oh well spanners at the ready
Re: Flywheel on the move
Posted: Sat Sep 12, 2015 11:43 am
by bristolmod
.........or do what the rest of us do- Ignore it and it'll go away!
Re: Flywheel on the move
Posted: Sat Sep 12, 2015 12:10 pm
by mick1
Could be an optical illusion....
regards your setting with the M-Tech. I'd be careful with your setting unless your racing. If your "cruising" then you may be under 6000 revs and your timing could be nearer 20.....possibly too far advanced. I have an M-Tech and use setting 5. The timing is set at 22/23 degrees and should go back to under 16 degree at 8k revs.
Re: Flywheel on the move
Posted: Sat Sep 12, 2015 2:14 pm
by Den 08
mick1 wrote:Could be an optical illusion....
regards your setting with the M-Tech. I'd be careful with your setting unless your racing. If your "cruising" then you may be under 6000 revs and your timing could be nearer 20.....possibly too far advanced. I have an M-Tech and use setting 5. The timing is set at 22/23 degrees and should go back to under 16 degree at 8k revs.
Tbh I haven't looked at the settings in the box just slapped it on like you do
will be doing a more thorough check tonight before I attempt to use on the road, I did think where am I going to be running around @7500 rpms probably once in a blue moon, as you said, in truth I will be around the 4500 to 6500 most of the time, but the flywheel thing threw me a bit,
bristolmod wrote:.........or do what the rest of us do- Ignore it and it'll go away!
I did kind of think that but then me sensible head kicked in
Re: Flywheel on the move
Posted: Sat Sep 12, 2015 4:17 pm
by IanGP
Ignore it until something falls off, then fix the bit that broke.
On a serious note, crank shouldn't have any sideways movement, could be loose oil seal retaining plate and bearing spinning in casing, every time you Rev the engine the cushdrive spring is pushing the crank sideways?.....whatever it needs to come apart.
Ian