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89 Posts
Already had the AI removed, Uni Flow air filter, Staintunes, and was rejetted 42 and 125, but the snorkel was still in place. I removed it last night. Took her out for a spin this morning to see the results.
VERY hard to start. In the past, with snorkel in she would fire up first or second try. Took at least four tries to get initial light off, she died and had to be restarted twice after that. VERY cold blooded now. In the past, snorkel in, used the choke out for a mile or so, then 1/2 choke for another couple of miles, then no choke. No problems anywhere during all that. Snorkel OUT, choke on, a bit of rough running and very definite surging. Throttle steady she would come on strong, back off, come on strong, back off again - with no throttle movement from the position it was in.
Once warmed up, not much noticeable difference in first gear, all the way up to ohh, say 5000 rpm. Didn't go above that. In second and above, from about 3000 rpm on, WOW! MUCH stronger pull. There is a most definite "seat of the pants dyno" torque increase evident. I wasn't ready for it the first time I cranked on it a bit in second, and she felt like she was about to leap out from under me.
Throttle response off idle has always been a little choppy. Hard to get a slow, smooth pull off idle. You get very little initial response, then it kicks in a bit more than you want rather suddenly. The snorkelectomy seems to increase that problem a bit as well.
I thought with the 42's and 125's in place the jetting would be about right, but the "new" cold hearted nature and increased choppy off idle throttle response make me wonder about the jetting.
I have never tuned carbs before, but I would like a more linear throttle response from off idle to WOT, better start/cold operations, keep the big kick in the butt torque increase (perceived increase anyway), but move it from 3000 and above to . . .ohh, say 2000 or 2500 and above. And get it to happen in first gear like it does second and above. Is all that doable by a carb tuning neophyte?
Any thoughts or suggestions?
VERY hard to start. In the past, with snorkel in she would fire up first or second try. Took at least four tries to get initial light off, she died and had to be restarted twice after that. VERY cold blooded now. In the past, snorkel in, used the choke out for a mile or so, then 1/2 choke for another couple of miles, then no choke. No problems anywhere during all that. Snorkel OUT, choke on, a bit of rough running and very definite surging. Throttle steady she would come on strong, back off, come on strong, back off again - with no throttle movement from the position it was in.
Once warmed up, not much noticeable difference in first gear, all the way up to ohh, say 5000 rpm. Didn't go above that. In second and above, from about 3000 rpm on, WOW! MUCH stronger pull. There is a most definite "seat of the pants dyno" torque increase evident. I wasn't ready for it the first time I cranked on it a bit in second, and she felt like she was about to leap out from under me.
Throttle response off idle has always been a little choppy. Hard to get a slow, smooth pull off idle. You get very little initial response, then it kicks in a bit more than you want rather suddenly. The snorkelectomy seems to increase that problem a bit as well.
I thought with the 42's and 125's in place the jetting would be about right, but the "new" cold hearted nature and increased choppy off idle throttle response make me wonder about the jetting.
I have never tuned carbs before, but I would like a more linear throttle response from off idle to WOT, better start/cold operations, keep the big kick in the butt torque increase (perceived increase anyway), but move it from 3000 and above to . . .ohh, say 2000 or 2500 and above. And get it to happen in first gear like it does second and above. Is all that doable by a carb tuning neophyte?
Any thoughts or suggestions?
