sleeper_dave
New member
It doesn't stop on this damn thing.
We honed the cylinders, they came out nice. When he measured it with the proper tools, it came out to as low as .0018 clearance in one spot. He opened it up to about .0032-.0038. The cylinders aren't perfectly round but they're good enough. You only have so much nikasil to work with.
Had him check my crank, too. One end was 8 thou out, other was 12. Kinda bad. Also had a couple of iffy if not downright bad bearings on the ends of the crank, so I'm going to order those. Once those are on, we're going to true it up and it should be good. Still, another hundred or two - like I said, it doesn't stop.
Hung around afterward and helped him with one of his projects. He's tuning up his brother's banshee. Made several dyno pulls, and tweaked a few things. He cut a new head for it too, tweaking the shape of the chamber and compression ratio to try to get the best curve. The quad is making right around 60 hp now, but it's a rediculously flat torque curve. Way smoother than the stock configuration.
I'm going to have him clean up the ports on my cylinders while it's apart, and maybe even cut my head a little. I might have him weld up and cut my old head for a little better performance too.
We honed the cylinders, they came out nice. When he measured it with the proper tools, it came out to as low as .0018 clearance in one spot. He opened it up to about .0032-.0038. The cylinders aren't perfectly round but they're good enough. You only have so much nikasil to work with.
Had him check my crank, too. One end was 8 thou out, other was 12. Kinda bad. Also had a couple of iffy if not downright bad bearings on the ends of the crank, so I'm going to order those. Once those are on, we're going to true it up and it should be good. Still, another hundred or two - like I said, it doesn't stop.
Hung around afterward and helped him with one of his projects. He's tuning up his brother's banshee. Made several dyno pulls, and tweaked a few things. He cut a new head for it too, tweaking the shape of the chamber and compression ratio to try to get the best curve. The quad is making right around 60 hp now, but it's a rediculously flat torque curve. Way smoother than the stock configuration.
I'm going to have him clean up the ports on my cylinders while it's apart, and maybe even cut my head a little. I might have him weld up and cut my old head for a little better performance too.
sleeper_dave
New member
Finally got my motor together last night. Ended up buying a used crank for $100, it was straight so we just replaced a couple of bearings on it and used it. Cut out the intake port in the pistons a bit, opened up the exhaust port (in the cases) a little bit, and cut the head .015". Should make a little bit more power than stock.
Over the spring / summer I bought a '96 XT chassis and suspension, a used track (damn near new camoplast, studded) and put the whole damn thing together on the new chassis. Should be a nice machine when I'm done with it, but i'm in close to $2k on something that might be worth $1500. Oh well, I guess.
Of the '94 ST I bought, all i'm using are the cylinders, chain case, brake, clutches, plastics, skis, and all the engine hang-ons (carbs, oil pump, water pump, etc.). Everything else is different, old chassis is scrapped.
I managed to piece together what I need for electric start, too.
Over the spring / summer I bought a '96 XT chassis and suspension, a used track (damn near new camoplast, studded) and put the whole damn thing together on the new chassis. Should be a nice machine when I'm done with it, but i'm in close to $2k on something that might be worth $1500. Oh well, I guess.
Of the '94 ST I bought, all i'm using are the cylinders, chain case, brake, clutches, plastics, skis, and all the engine hang-ons (carbs, oil pump, water pump, etc.). Everything else is different, old chassis is scrapped.
I managed to piece together what I need for electric start, too.
sleeper_dave
New member
Made it 32 miles and caught a ring on the exhaust port. Bought a used cylinder, honed it, matched the porting on the other cylinder, bought a new wiseco top end kit, opened up the intake hole a little bit (not as much as before, wanted to be able to tune it easier), and made sure the chamfer on the ports was good. Got it back together and ran it this weekend. Got the carbs close but the clutching needs a lot of help - see my other post 
braindead1684
Member
Good luck buddy that sux you only got 32 miles before she caught on ya, hopefully she will be good to go from now on.