Hi All,

I have just bought a 2003 v-star (Dragstar) 650 and it came with slash cut pipes.

Is the lack of back pressure bad for the bike?

I was thinking of a homemade job, for example:

1: DIY Baffle

http://www.650ccnd.c....xhaust_mod.pdf

2: DIY Thumb screw mod

http://www.nightride...ech/exhaust.htm

I read somewhere that as a consequence, the bike may burn lean and eventually destroy the engine.

Something to do with rejetting?

Any comments are welcome.

Is the lack of back pressure bad for the bike?

Serious lack, yes.

Small lack, not really.

I read somewhere that as a consequence, the bike may burn lean and eventually destroy the engine.

Something to do with rejetting?

Depends who you ask.

Every mechanic I've ever spoken to strongly advises rejetting. Bikes were designed at a cost of millions to work a specific way, so in altering them you need to keep everything in balance.

Rejetting is simple enough and may only need the existing jets altering slightly.

Personally it's something I would have a mechanic do (and I've yet to arrange it for my own bike).