Rejetting for straight pipes?

[Guest]

So I have a recently acquired 1983 GS650GL, which happens to have straight pipes on it. Everything else non-cosmetic is stock to my knowledge. Anyway, it starts to sputter at about 60mph. My question is what size jet would be optimal for this model and exhaust setup?

Thank you,
Boh

[Runeight]

My question is which exhaust would work better.

[bohisboh]

My question is which exhaust would work better.

You're saying going back to stock pipes would be best?

[Big T]

You're saying going back to stock pipes would be best?

Definitely

No rejetting, or jet kit. No endless fiddling around with the carbs. Your neighbors don't hate you

You'll lose 2 hp and gain 8-10 mph

What could be better?

[Runeight]

You're saying going back to stock pipes would be best?

Stock is always best. The problem is finding them. Aftermarket is an option but that might involve jetting also however a slighter jump in carburetion.

Do a search, plenty of members here to help. I run stock whenever possible.

[Nessism]

Straight pipes are for losers. Be responsible and caring, install mufflers. Harley castoffs are readily available and cheap. Places like JC Whitney sell Dunstall replica mufflers that are reputed to have a throaty sound but not obnoxious.

[bohisboh]

Definitely

No rejetting, or jet kit. No endless fiddling around with the carbs. Your neighbors don't hate you

You'll lose 2 hp and gain 8-10 mph

What could be better?

I hear you. That would be a lot less headache. From that point what would be the best route to imitate the current raw sound? Also it's matte black so I'd also just repaint? Or do any come in black. Thanks and pardon all the questions I'm new to this stuff.

[bohisboh]

Straight pipes are for losers. Be responsible and caring, install mufflers. Harley castoffs are readily available and cheap. Places like JC Whitney sell Dunstall replica mufflers that are reputed to have a throaty sound but not obnoxious.

Right on! Thanks answered my other questions.

[Runeight]

Dennis Kirk has good prices also with free ship.

Black available depending on style.

[JTGS850GL]

Since you've just recently acquired this bike you may want to consider doing some basic maintenance on it. Some of your issues may be simply resolved by doing that.

Once you've replaced the stupid straight pipes then consider doing a complete valve adjustment and then a complete strip and dip of your carbs.

[bohisboh]

Yeah absolutely some of that has been done i.e. oil change, brake fluid etc. That's down the road but is definitely something I'd like to have done, first being able to ride down the road decently

[dantodd]

Yeah absolutely some of that has been done i.e. oil change, brake fluid etc. That's down the road but is definitely something I'd like to have done, first being able to ride down the road decently

You'll find that properly cleaning the carbs, making sure there are no intake/exhaust leaks, and doing a valve adjustment are prerequisites to rejetting because they effect the jetting. In fact, doing those basic maintenance items might clear up your problem and you might not have to rejet. Then you can decide whether to replace the straight pipes or put on some sort of muffler and jet appropriately.

[bohisboh]

You'll find that properly cleaning the carbs, making sure there are no intake/exhaust leaks, and doing a valve adjustment are prerequisites to rejetting because they effect the jetting. In fact, doing those basic maintenance items might clear up your problem and you might not have to rejet. Then you can decide whether to replace the straight pipes or put on some sort of muffler and jet appropriately.

Makes perfect sense to me. Is there any black exhaust systems you would recommend that would fit this make/model whilst still achieving a throaty sound? I've been attempting to dig but don't know the first thing.

[dantodd]

Makes perfect sense to me. Is there any black exhaust systems you would recommend that would fit this make/model whilst still achieving a throaty sound? I've been attempting to dig but don't know the first thing.

I'm still new here too so I done have a ton of experience across the GS line. I'm trying to figure out what to do with my exhaust. But if straight slip on will fit is try the harley mufflers. They're plentiful and cheap, I sometimes see them on Craigslist for $50 for q pair. (on my bike the header ends underneath and I need mid pipes or bent muffler)

[dantodd]

Measure your header diameter and see if these will fit.

https://ventura.craigslist.org/mpo/5559143080.html