gentlemanjim
More Wrenchin than Ridin
The Roadster build is 99% finished, but still have isssues. The engine fires right warms quickly and has excellent throttle respone in neutral. Out on the road its a different story. Spits and farts struggles to reach 5000 rpm on the interstate. Idles fine and fairly smooth up to 3500 rpm.
The mods: 2-1 free flow exhaust, K&N air cleaners. Rebuilt and rejetted carbs - 137.5 main jets and 47.5 pilot jets, I did not adjust the needle, mixture screw out 2.4 turns. High output coil.
I pulled the plugs BPR7EXI and they looked good, put in the original old dirty BPRE7ES ran a few miles no improvemetn, but when pulled they were bright white. Tried BPR8ES no improvement.
I'm thinking lean condition, but why? The oversize jets should have prevented lean out.
So I appeal to you my brothers and keepers of the XS secrets for help.
The mods: 2-1 free flow exhaust, K&N air cleaners. Rebuilt and rejetted carbs - 137.5 main jets and 47.5 pilot jets, I did not adjust the needle, mixture screw out 2.4 turns. High output coil.
I pulled the plugs BPR7EXI and they looked good, put in the original old dirty BPRE7ES ran a few miles no improvemetn, but when pulled they were bright white. Tried BPR8ES no improvement.
I'm thinking lean condition, but why? The oversize jets should have prevented lean out.
So I appeal to you my brothers and keepers of the XS secrets for help.