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Post by scooternub on Apr 17, 2021 7:23:41 GMT -5
A closer look at the last picture showing the pipe to cylinder mounting concerns me a bit. It could be just the picture, but is the pipe flange absolutely flat against the cylinder? If not, remove the pipe hanger bracket bolts and snug the flange to cylinder bolts up good. Now see where the pipe hanger bolt holes line up. If the pipe hanger bolt holes do not line up, try slotting the exhaust flange on the pipe just a bit so you can turn the pipe a bit. I have had pipes that line up terribly when bolted only to the exhaust flange, sometimes you have to get real creative with the pipe hanger mounts. The pipe should not be moving at all when you tighten up the hanger bolts. I hope this helps. it was the way the camera was pointed. it looks good when I looked all around the flange. also I can't use the old pipe because it has a big hole in it and the mounts are bent to hell because I was trying to get the spacers off of the brackets to use on the new exhaust bracket spacing. but here's the picture of the flange and picture of the big hole of the old pipe.
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Post by oldgeek on Apr 17, 2021 7:26:23 GMT -5
Oh yeah, that looks fantastic!
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Post by scooternub on Apr 19, 2021 7:59:25 GMT -5
on the engine that is port work, exhaust port work should add higher rpms alot of us will polish the exhaust port so it flows faster and match the exhaust port size to the pipe size . I found with that exhaust stock rollers and springs worked ok a 1/2 gram lighter and medium springs made it real fun . As far as up jetting i had to go up the same as a expansion pipe about 5 %. That is a fun stealthy pipe adds some top end and gives a lot better take off with a wide powerband , i bought a #77.5, #80 & #82.5. 5% of #75 would be #78.75, thats between two that i have.
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Post by Zino on Apr 19, 2021 8:22:42 GMT -5
75 ,77.5 and 80 will get you close enough . One or 2 of those will feel best on wide open runs .
Some scoots are jetted rich stock so you often don't need to upjet just raising the needle gets the job done .
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Post by scooternub on Apr 19, 2021 9:14:58 GMT -5
75 ,77.5 and 80 will get you close enough . One or 2 of those will feel best on wide open runs . Some scoots are jetted rich stock so you often don't need to upjet just raising the needle gets the job done . okay. I installed the #77.5 the other day. for me to go wide open I'm going to need to start on the CVT. I bought a scale so I'll measure and figure out what weight I need to use to drop by half a gram.
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