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General Category >> Rubber Side Down! >> Some mod concerns
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Message started by jsw1159 on 07/17/09 at 11:47:14

Title: Some mod concerns
Post by jsw1159 on 07/17/09 at 11:47:14

I have switched out my stock muff for a HD muff, I want to do the re-jet and white spacer mod but a guy from the place I wanted to buy the main and pilot from, told me that after a couple seasons with this set up I will burn out my valves. Is this true or what? Please help

Title: Re: Some mod concerns
Post by Yonuh Adisi on 07/17/09 at 11:49:40

There are several if not hundreds of folks here who have been running a set-up like that for years without any trouble.

Title: Re: Some mod concerns
Post by jsw1159 on 07/17/09 at 11:53:26

Thats what I've been reading but I was'nt sure if it made a diff. with a newer bike. I have a "07"

Title: Re: Some mod concerns
Post by Yonuh Adisi on 07/17/09 at 11:54:44

The engines in these bikes haven't changed since the Savage came out except the change from 4 speed to 5 speed.

Title: Re: Some mod concerns
Post by jsw1159 on 07/17/09 at 11:58:31

Ok then I'm going for it because I do like the sound of Hd muff. thanks a bunch..... Must say this is a great place to get imfo from. once again thanks.

Title: Re: Some mod concerns
Post by bill67 on 07/17/09 at 12:42:47

The closer to stock the longer it will last,That gos for cars too.

Title: Re: Some mod concerns
Post by LANCER on 07/17/09 at 16:23:10

68756365636C6467636E66020 wrote:

The dude is nuts !
Proper rejetting & tuning to match a dyna muffler will result in a cooler running engine which will increase engine life and performance as well. The power increase is nowhere near enough to cause any type of harmful stress to the engine assembly.

Title: Re: Some mod concerns
Post by groupus on 07/17/09 at 19:57:30

I think the guy your buying the jet from probably just assumes that you have not idea what you're doing. The type and amount of free flow through your HD muffler will determine how much you need to re-jet, but doing so is almost always a necessity. You may need to experiment to find what makes the bike happy. Keep an eye on the color of your header too.

I have a pretty much straight through HD exhaust with only a small bump for a baffle, 155 main, tuned pilot, and unmolested white spacer. This gives me more torque, better highway performance, and up to 70 mpg if i'm behaving.

Good luck,
-G

Title: Re: Some mod concerns
Post by dasch on 07/17/09 at 22:56:32

You can actually burn exhaust valves if you don't rejet. Engine runs very hot when in lean condition.