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post #1 of 7 (permalink) Old 04-27-2013, 08:43 AM Thread Starter
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Tuning Issues

Howdy from Dayton, TX

Well this may or may not be covered but I haven't found a thread with my exact issue.

I have a V-Star 1100 Custom that I bought with the pipes already cut right where the baffles should start. I bought the Max Air kit (before I joined the forum and saw the threads about diy pod kits). Anyway got it in and installed but I'm still backfiring. Tried 145/142.5 first, sounded better than stock jets. Tried 150/145 and went back to backfiring. Put 145/142.5 back in and I'm still backfiring. Also idle has a Harley lub lub lub to it.

I'm leaning toward trying the $20 torque cones if I can get them before spending money on new exhaust, but I was wondering if anybody had success with them or has a similar setup.

Also one diaphragm has the white plastic ring/spacer burnt and I don't know how much this is effecting it. I'm also missing a hose clamp for the crankcase breather, but again I don't know if this would effect anything or not.

Gonna sync the carbs today also and see if that helps.

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post #2 of 7 (permalink) Old 04-27-2013, 08:52 AM
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Carb sync is a must.

Is the AIS still in place and functioning?

Once carbs are synced, AIS is removed or at least disabled, then it should be a matter of adjusting the PMS. How many turns out do you have the PMS currently?


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post #3 of 7 (permalink) Old 04-27-2013, 08:53 AM Thread Starter
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post #4 of 7 (permalink) Old 04-27-2013, 08:56 AM Thread Starter
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I cranked it with 3 1/2 on 145/142.5 set up. Won't be able to sync carbs until later today. Daddy's baby sitting lol.
But you don't think it's a back pressure issue. A lot of posts cite that on here.

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post #5 of 7 (permalink) Old 04-27-2013, 08:58 AM Thread Starter
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And the AIS is disabled, forgot to mention that.

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post #6 of 7 (permalink) Old 04-27-2013, 10:20 AM
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Quote:
Originally Posted by wtk0315 View Post
Here's a picture for clarity
looks like a tear in the diaphragm? That would affect the carbs working in syinc
Like mentioned if carbs are not synic the bike cab back fire and be major loss in power

Last edited by aide; 04-27-2013 at 10:22 AM.
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post #7 of 7 (permalink) Old 04-27-2013, 11:25 AM
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Also make sure you don't have an exhaust leak at the headers. I had that issue. I added some permatex copper gasket maker to the crush gaskets. Sealed everything right up...problem solved.


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