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81 gs650g won't go above 35mph

  • Thread starter Thread starter 60ratrod
  • Start date Start date
yes, and i did not know that the pipes were aftermarket. thanks for letting me know. are the headers factory or no? what jets do i need for the carbs?
 
The headers are part of the aftermarket (probably MAC) system.

What jets? No clue. You will have to read your spark plugs to see what they are telling you.

Here is a picture from the gallery of an '81 650G with stock pipes.

Note the megaphone with no turn-outs.

0957-1.jpg


.
 
60ratrod said:
yes, and i did not know that the pipes were aftermarket. thanks for letting me know. are the headers factory or no? what jets do i need for the carbs?
Click to expand...

If they are not already in them, I would try 102.5 or 105 main jets and adjust the fuel mixture screws accordingly. Z1 Enterprises has the best prices on main jets as far as I know.
 
This engine came stock with 110 mains - if your exhaust is more free flowing, you'll have to go bigger. Investigate air filter ,just in case PO got creative.
But if these carbs aren't cleaned properly, your mid range performance (where you likely spend lots of time) will be poor
 
well i will go back through them for the 3rd time here in a couple days. i say a couple days because i wanna get in some seat time before i get my kids(oldest just turned 5 and the twins turn 3 in august). when i have them, it's all about them, not me. i'll have them for a couple weeks so i'll have time to go through the carbs when they go to bed.
 
Ok, I still have yet to get back out and work on the bike. I've been busy spending time with my kids. but come to find out my signal generator is bad and I've been cruising around on 2 cylinders, which explains why it was a chore to get it up to highway speeds and maintain those speeds. she will not be ridden until all 4 are firing and the carbs have been sonic bathed
 
She's a good looking beastie. A very nice jumping off point. I'm not a fan of the turnouts, but if they do the job, they are better than having nothing on the ends of the headers.

Are you sure it is the signal generator that's gone out? Is that information via the service manual tests?

If it is the signal generator, then you'll have to spend some quality time with the electrical system. Shutting down like that, with a bad (draining) battery is highly suspect. Yes, get that firing sorted out as dumping raw fuel into the exhaust (or worse, not dumping it at all) can't be good.

How and when did you lose the stator cover emblem?
 
Shamefully, I dropped the bike while unloading it when i got home. But I was more concerned about my neighbor than the bike. I lost my grip. anyway, I know the generator is bad because it's out of spec. Metering blue to green, I should be seeing between 250 ohms and 360 ohms, I got 421 ohms metering blue to green and green to blue. the "new" generator should be here tomorrow that I got from ebay. I wanna see if there's a way to fix the magnets. and I actually prefer the look of the turn out pipes. I think it looks good with the caf? style bars. I need new mirrors though.

Once I get this gs going good, I need to get my 81 kawi kz1000m1 csr going. I need to figure out why it's got a miss on 2 & 3. I have a feeling it might be the dyna kit I put on it. I'm gonna do one of the gm diy ignitor and see what happens and what that does for me
 
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