A question about timing pickups...

[Thunderdome74]

Hi everybody

So the bike is running well, starts airly easily etc, Still has clutch rattle
The carbs are bench sysnched as close as possible (to my eye)
I statically set the pickups and the clutch rattl started to go away.

HOWEVER, while idling smoothly at around 800k it will surge for half a second or so to round 1k(about every 30 seconds to a minute of idline)
The carbs are a s clean as i can make them (mike nixon)
But i am rattleing on...

Question... How do i check that the individule pickups/plusars are in the correct positions.
All i can do atm is check the main plate plusar is at 1-6 tdc
I have scoured the net , the manual etc and i am just not getting it.
Could somebody please point me in the right direction (i can get hold of a good timing light )

Thsnkd so much
Thor

[jnnngs]

Hi,

You have probably already done this, but assuming the bike is standard, then the procedure is:
- turn the engine over so that the "F" mark on the end of the crank (right hand side) aligns with the crank case join (the "T" mark is TDC, the "F" mark shows when the engine should fire)
- the cam (that spins) should now be aligned with the lower left pickup, and adjust the backup plate so that both "protrusions" on cam and pickup align.
- assuming a standard pickup, that should set all three and they don't need to be setup individually.
- you can check them with a strobe, but static is good enough.

If the engine has been apart, it's not unusual to have a problem with the timing. It's easy to put the primary shaft in wrong so that it's out by one tooth which screws the timing up.

Your symptoms look like the carbs need to be balanced using vacuum gauges - surging is a common problem if not exactly synchronised,

Paul.

[Thunderdome74]

Hi Paul

Sorry for the late reply

i think you are right... the carbs...again.

I think its might be float levels... Sigh
Good thing they are so easy to take out

tx again
Thor

[steve murdoch icoa #5322]

I would look into the carb synch before removing the carbs for a float height check.
Your rattling clutch could also be in need of new rubbers. http://www.sixcenter.nl/onderdelen/deta ... 3&start=31