Author Topic: Flywheel Shutter Strap (Read 9521 times)

F-Red · « **on:** September 21, 2013, 09:03:32 PM »

Does this area of the flywheel, look ok? Any reason this could, effect the timing?

rsss396 · « **Reply #1 on:** September 21, 2013, 09:09:48 PM »

yeah that will be ok the trailing edge actually triggers the cdi

DnB_Racing · « **Reply #2 on:** September 21, 2013, 09:10:10 PM »

Quote from: F-Red;12784

Does this area of the flywheel, look ok? Any reason this could, effect the timing?

I highly doubt it, being it isn't even off by a 1/16th of a degree ...

there is no real current going through the pick up its more of a proximity switch just picking up the difference in the potential surface, I've seen prox switches run with inches of sludge and debris built up on them

F-Red · « **Reply #3 on:** September 21, 2013, 09:17:19 PM »

Thanks Guys. Just trying to eliminate all, possibilities.

DnB_Racing · « **Reply #4 on:** September 21, 2013, 09:20:40 PM »

Quote from: F-Red;12787

Thanks Guys. Just trying to eliminate all, possibilities.

what's your symptoms?
sorry if its posted someplace else, but just curious what the problem is

F-Red · « **Reply #5 on:** September 21, 2013, 09:27:34 PM »

Just here. Long story short, 4th piston on ESR 330 cylinder. Making sure timing is not advanced too much. CR ignition, fully retarded, looks like it's advanced too much. I have a timing tape for the flywheel, I'll install tomorrow.

F-Red · « **Reply #6 on:** September 21, 2013, 09:37:32 PM »

DnB_Racing · « **Reply #7 on:** September 21, 2013, 09:43:45 PM »

Quote from: F-Red;12790

Just here. Long story short, 4th piston on ESR 330 cylinder. Making sure timing is not advanced too much. CR ignition, fully retarded, looks like it's advanced too much. I have a timing tape for the flywheel, I'll install tomorrow.

which cdi are you using, are you sure you don't have a 125cc cdi in it?

and at what rpms do you have your idle at

F-Red · « **Reply #8 on:** September 21, 2013, 09:50:28 PM »

It's the CR250 CDI. I've authenticated it's the 2001 CR250, complete system.

F-Red · « **Reply #9 on:** September 21, 2013, 09:59:25 PM »

ledperformance · « **Reply #10 on:** September 22, 2013, 12:35:02 PM »

If you are running a 330 with an exhaust pipe and silencer with 1" id tail pipe and muffler core you will likely have piston problems if you are making horsepower. If you are running a 38-41mm Kehein carburetor with a DGJ needle you are likely to have problems.
Run a 1 1/8 id tail pipe and muffler core, choose a richer needle such as DEJ, DEK or DDJ (depends on carb and combination) and I think your piston problems will go away.
I hope this helps.

F-Red · « **Reply #11 on:** September 22, 2013, 01:00:28 PM »

I'm running a older TRX5. Stinger O.D. 1.125, I assume I.D. 1 in. Never heard these pipes weren't a good match for a 330. 38mm Airstyrker, DGH needle.
Fuel jetting feels right.

F-Red · « **Reply #12 on:** September 22, 2013, 01:09:02 PM »

Timing Tape.

I always felt the timing is advanced too much. Idling, the tape is numbered incorrectly. On the advanced side numbers, 15 is 20 and 20 is 30.
Looking at this picture, it's close to 20 degrees advanced. Revving the engine, retards to around, 15. These are not ideal numbers. What is wrong?

DnB_Racing · « **Reply #13 on:** September 22, 2013, 02:08:08 PM »

to be accurate you really should have a tach,
but if your saying you have 15 degrees advanced around 6750 rpm that's right on the mark for a 2001 timing curve,

are you getting any knocking? what makes you say you always thought timing was to advanced?

rsss396 · « **Reply #14 on:** September 22, 2013, 02:39:30 PM »

well in the one picture you had, the stator plate is turned counter-clockwise all the way (retarded), you will normally get about 4 degrees of advance or retard with the factory slot so if you take away 4 degrees from 20 that puts you right at 16 degrees.
Your picture shows 15, but the angle you took the picture can show at least 1 degree difference, especially without a pointer right next to the flywheel.
try advancing the stator now and check you timing.