[nau_lax21]

So a few months and a few thousand miles back, I got a Yoshimura slip-on pipe on my 07 GS500F. The dealership that installed the pipe never said anything about rejetting or needing to, so I didn’t think anything of it. I thought that you only needed to rejet if you changed out the whole exhaust, not just a slip-on.

Now yesterday a friend tells me that I need to rejet ASAP and one of his buddies bikes “blew up” because he put a slip-on on and the motor ran too lean.

Do I need to worry about this? Any advice?

[Spool]

The best way to know is to check your plugs. Most Suzuki’s (and most new bikes in general) come from the factory jetted on the lean side to pass emissions tests easier. I think that most slip ons will require a rejet, not as big of change as a whole exhaust system would require but still the slip on is going to be a little free-er flowing than the stock can. Better safe than sorry as they say, I’d check it or get it checked if I were you a lean condition can ruin an engine. On the plus side if you on running lean and you re-jet to the proper jet you will likely see a gain in power.

Here’s a good link on reading plugs to get you started.

http://www.totalmotorcycle.com/maintenance/sparkplugs.htm

[Munch]

I don’t see the need for you too. Only reason you should is if your using an O2 sensor for emissions control . I am unsure of what exactly slip ons really do and will look it up as best I can . However general rule of thumb is the exhaust should only help get things out ( only bad if the engine needs back pressure). Other then that I don’t see the need.

[Author]

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