benroloff
Been Around the Block
Been working on this bike this week before classes start up again. I swapped the crank over to the 125 unit, and I looked over the transmission and replaced one shift fork. Other than that, nothing else really looked too bad. Someday I would like to build this engine from the ground up, I’d love to see just how far I can take it on original cases, but today is not that day haha. I think I’ll place a big order with David Silver in the next week or so here and get the piston and some other misc stuff.
For anyone else messing with these engines, I did find that swapping the cam cover and cdi unit from an atc200 or trx200 (looks like that spare engine is gonna come in real handy after all, thanks ken!) is possible and there doesn’t seem to be any issue with fitment on the one piece heads, albeit some slight overhang on the cam cover. Only difference I can find is the “snout” on the earlier cams seem to be shorter, so it doesn’t extend all the way through the pickup rotor. I plan to either just use a longer bolt here, or swap the 200 cam over altogether. I believe the cams should be direct swap, though I’m not 100% sure yet. But I figure this would net some performance and help make sure everything fits just right.
There will definitely be some wiring and electrical guesswork to get this converted to CDI, but I think it’d be worth it in the end
If anyone has any pointers or experience with doing a CDI conversion and cares to share some knowledge it would be much appreciated!
Sent from my iPhone using DO THE TON
For anyone else messing with these engines, I did find that swapping the cam cover and cdi unit from an atc200 or trx200 (looks like that spare engine is gonna come in real handy after all, thanks ken!) is possible and there doesn’t seem to be any issue with fitment on the one piece heads, albeit some slight overhang on the cam cover. Only difference I can find is the “snout” on the earlier cams seem to be shorter, so it doesn’t extend all the way through the pickup rotor. I plan to either just use a longer bolt here, or swap the 200 cam over altogether. I believe the cams should be direct swap, though I’m not 100% sure yet. But I figure this would net some performance and help make sure everything fits just right.
There will definitely be some wiring and electrical guesswork to get this converted to CDI, but I think it’d be worth it in the end
If anyone has any pointers or experience with doing a CDI conversion and cares to share some knowledge it would be much appreciated!
Sent from my iPhone using DO THE TON
