'76 GT250A Left Side Points and Timing.

[alfiemorris]

Hello! I'm back with a new to me 1976 GT250A Bike. I've missed my T250 Huster so here I go again. I am having the same issue as others have had setting up the Left side Points and Timing? I've done search on here but found nothing that can help? Why is the left hand spark so far advanced? I just can't retard it in order to get that side Timing Marks to line up as the points start to open? Any advices out there please?

[joethebike]

Use a dial gauge to measure piston travel and check the rotor timing marks.
If they line up adjust the points gap to bring the timing within range.

[Craig380]

If you're using aftermarket points (that is, not Denso branded points) then you might need to use a narrow round-tail file to open up the points adjustment slot a little to get the adjustment you need. I had this with my old GT380, aftermarket points needed fettling a little so I could dial in the timing.

As Joethebike mentioned you can also fiddle with the points gap a little, as long as you don't go outside the 12 to 16 thou range.

Also don't forget that Suzuki never changed the timing marks on the crankcase / rotor during all the different models, and the correct timing for the A model is a LOT more retarded than the earlier K/L models, so you really do need to use a dial gauge to get the timing set correctly. Once you've used the dial gauge you can scribe some new timing marks to make setting easier in the future.

[jabcb]

Service Bulletin GT-30 covers timing for the 76 GT250A:
http://www.ozebook.com/compendium/techb ... 027-33.pdf