1983 Suzuki GR650 XD Cafe Build

[Hoosier Daddy]

i put the carbs back together cus i want to get it running asap yet they still need floats and needle seats. which r gonna cost me $200 including shipping geez.

Dude! that seems awefull high... did you check out Z-1?
http://www.z1enterprises.com/catalog.aspx?pid=GR650XD-1983

[Big Rich]

Agreed. Doing a quick search on ebay:

 http://www.ebay.com/sch/i.html?_from=R40&_trksid=p5197.m570.l1313&_nkw=gr650+carbs&_sacat=See-All-Categories

And there is a pair of GR carbs missing some parts for $50. But the parts missing are still available.......for much cheaper than $200.

[Hoosier Daddy]

Generally speaking...
There were very few emission law changes between 81 and 83... So both gas caps probably have a one way check valve (vent) to let air in, but not out. This was for fuel to flow just as you thought, but keep hydrocabons (Gas Fumes) from venting out to the atmoshphere. I checked the part # for the cap on an 83 GR650XD but without knowing just what 81 model, I took a guess and went with the GS650G... It uses the same part number cap,44200-49810 so I think you are golden there... or should be.
 Typically that second hose barb is not for a vent to the tank but for a vacuum hose from the carbs. (POS safety devise) If the engine is running (or cranking) vacuum is supplied to a diaphram on the OEM petcock and opens it. If the engine dies, vacuum stops and fuel is shut off. That's why they had a "Prime" position that bypasses the diaphram and opens it to get fuel to the carbs on initial startups after a repair or long period of setting.
 

[jessejamez]

i bought new carbs, the regular 36's, they r tuned and ready and also a brand new petcock now im stuck on wiring!!!!!!!

[jessejamez]

i need to put more coats of the brass colored sealer.. i love brass. when im making frames i want them to be Black pipe with brazed welds ya know what im saying? BRAZE IT UP HOMIE!!! BRAZE IT UP! lol looks cool as hell. i surprize my self this bike looks bad fuckin ass i cant wait to start MMI! Thats lava colored wrap by the way. the second pic is the lopsided hole in the seat which kept flooding the carbs out and is the reason the bike has only 724 miles unbelievably!!!

[jessejamez]

SOMEONE HELP! IM STUCK ON WIRING!!!! where r my main ground connections obviously the starter (-) is grounded i have everything ready to go and i cant get it to turn over! i need to complete the circuit HELP!!!!!!!!

[Big Rich]

If I recall correctly, the main ground goes from the battery terminal directly to the rear of the engine block (below the shock adjuster). There is also a thin ground wire that comes off the main ground wire, and has a single pin connector that ties it into the rest of the harness.

[Hoosier Daddy]

Your starter usually is grounded to the engine case by being bolted directly to it.

[jessejamez]

u guys r not gonna believe this i hooked up the break and clutch terminals and all i had to do was pull in the clutch and it turned over. all the wiring was correct i couldnt believe it. haha i put gas in and it started right up but there is a leak in the carbs. i have it on factory settings but i cut the pipes and put baffles in them and also put on a K&N filter instead of the original airbox how should i adjust my carbs for those customizations? once i fix the leaks in the carb if its still not idleing ill be looking at your suggestions thanx guys. i'll have a videop soon of it running once i fix the leaks cus i dont want my hard work to start on fire ya know lol.. I CANT THANK U GUYS ENOUGH THIS SITE IS INCREDIBLE. EVERY QUESTION I HAVE U GUYS WERE MORE THAN WILLING TO HELP ME WITH AND I AM FOREVER THANKFUL I LEARNED SO MUCH

HERE R MY NEW CARBS I GOT FOR $150 COMPLETE AND SET UP ALREADY, ALSO I GOT THE AST PIECE OF THE PUZZLE MY BRAKE/LICENSE PLATE LIGHT AND HOLDER

[Big Rich]

Ah, I see. I was unaware you got the BS36's. Wise choice. A leak in the carbs can mean a lot of things actually - sticky float needle, sticky floats, bad bowl gasket, etc. If you can see the leak on the carbs, it's most likely the bowl gasket.

Carb tuning is a dark and mysterious art. Actually, it's just a lot of work. Nobody will be able to tell you for sure what your carbs will need, and you can't really find out until the bike is able to be ridden.

[peteGS]

Glad to hear you got her running! It's real satisfying when that happens ain't it?
 
Like Rich said, tuning is just a matter of work... I still haven't started on mine properly yet. Was hoping to do it this weekend but not happening now.
 
There's a tool called a Colortune that will let you see the colour of the spark and help you get her running right, but best to get some miles on her first and then start fiddling.
 
Edit: Just read your signature.. haha no probs mate glad I could be of some help

[jessejamez]

ya it feels great all that hard work coming together and i finally have the thing that is gonna make this bike ride perfect a jet kit! here is the info they gave me with the kit tell me what u think i really would like to know about the drilling. rich which jets do u run the 147's or the 142's? did u clip the slide spring? how many shims or nylon spacers did u put on and did u drill a auxillary hole in the vacuum port? here r pics tell me what u guys think? i need this set up by sat morning i have the big unveiling at my going away party. here r pictures let me know what u think please!
thank you - Jesse
p.s. if u look at the bottom right of the page these r the mods i told them about and they said they would engineer the jets accordingly)

[jessejamez]

i was gonna post pictures of the pieces i have but the are written under the "parts list". i appreciate all feedback as you know thanks in advance.

i have the elevation in the bottom right corner of the previous pic im goin for and elevation of 1124ft and probly higher for a little mountain riding with my girl

[Big Rich]

Honesty man, it's a guessing game on my end. It will run with either of those main jet sizes, and it will run regardless of where you have the needle set. When in doubt though, run it on the rich side - bigger mains and the needle with a shim or two.

[jessejamez]

how about drilling that auxillary hole or clipping the spring did u do any of that?