Timing gap on flywheel

[pigpen966]

Hey guys, I have a 2018 GP 300 with the EE51100CT-CRB-1 CDI. Bike has run great for 210 hours. Started having no spark issues. Came down to bad CDI, got a EE51100CT-CLJ-1 CDI and it fixed no spark but timing is off. After some research they use two different flywheels. CRB-1 uses a 63 degree and the CLJ-1 uses the 30 degree. Anybody have both they can measure the gap for me?

TIA

 

[gasgasman]

The gap is non adjustable.

 

[Jakobi]

The gap is non adjustable.

The flywheel can be modified. It's the actual cutout in the flywheel itself. I can't recall where I saw the pics but think it was on Thumpertalk. The Aussie distrubuters were doing cdi updates and mods for owners. Mine is still the old one.

 

[pigpen966]

This is the picture of the two. I checked the parts list and there is different numbers for the 18 versus 19.

Would love not to modify it but the CRB-1 CDI is unobtainable I reckon.

 

[Jakobi]

Just to confuse you more.. Mine is a CLK on a 2018 EC250. Haven't physically inspected the flywheel cut out.

But in saying that. The CDIs are the same. It's the mapping on them that differs. Might be a dealer somewhere that can reflash the new one to your old 2018 setting vs modifying flywheel. Or can you source a 2019 flywheel?

 

[pigpen966]

Just to confuse you more.. Mine is a CLK on a 2018 EC250. Haven't physically inspected the flywheel cut out.

But in saying that. The CDIs are the same. It's the mapping on them that differs. Might be a dealer somewhere that can reflash the new one to your old 2018 setting vs modifying flywheel. Or can you source a 2019 flywheel?

I've reached out to a couple dealers in the US if they can reflash the CDI to the old map. This is what I'd prefer because the bike runs perfect with the original mapping. Still waiting to hear back from them. Then my next issue is getting it to them. With everything shut down there is NO mail going out of Costa Rica. I can still get stuff here thru a drop shipper but I'd have to find somebody to hand carry it to the states. Probably be at least a 2 month process. I guess that's the price you pay for riding a gasser in paradise!!

 

[Duster]

Hi, i changed to new flywheel due to bad spark with e-start, it run odewise perfect, i changed flywheel and gasgas dealership reprogrammed my cdi. No bad behavior came with it, only starts better. If u can do it somehow, it is worth it.

 

[farmerj]

Duster, do you know what the difference was in the new flywheel, and why it made your bike start better?

I have the 30mm cutout, and the dealer re-programmed the CDI but didn't change the flywheel - and I'm wondering if that's why it doesn't start consistently (that is, when it turns over - but that's another problem!)

Jeff

 

[Duster]

Difference is ignition coil charging/loading time. With newer flywheel and new software, it gives good spark at lower rpm. I had also problem, that starter gives reasonable rpms to engine, but no starting and that was due to no spark or intermittent spark at e-start rpm's. The gap was approx double the size it was before.
2019 models flywheel and sofware also work and the flywheels are same.

 

[farmerj]

I can have the flywheel machined to remove material and create the larger gap.

My question is - doesn't a flywheel need to be balanced? Asked another way, if I remove material by making the existing cutout wider, won't it cause the fw to be out of balance?

And does it matter which side of the cutout (or gap) the excess material is removed from?

Thanks,

Jeff

 

[Anders]

I can have the flywheel machined to remove material and create the larger gap.

My question is - doesn't a flywheel need to be balanced? Asked another way, if I remove material by making the existing cutout wider, won't it cause the fw to be out of balance?

And does it matter which side of the cutout (or gap) the excess material is removed from?

Thanks,

Jeff

yes, I would presume you would need to balance it by removing some material on the "other side" of the flywheel.

I'm quite certain it is important that you remove material from the correct side of the gap, as this gap controls the ignition timing (if I'm not mistaken).