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1977 Suzuki GS750e w/ Yoshimura bits

mdelosrey said:
...Will need help with the carbs because I have to keep the choke on for it to stay running. Can anyone identify these carbs? He said they were Mikuni smooth bores but which exact ones are they so I can find a rebuild kit...
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I think it says Keihin right on the sides of the carb, don't think those are Mikuni smoothbores? It's not a hand bent Yosh pipe either, those are very rare and the header pipes are cut and welded sections, lots of them. Memory is fading but it looks like stock carbs. Sudco will have what you need.
 
GPzPop said:
or block it up with sections of 2x4
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Good tip!

Cincinnatus said:
Ammo. . . Is he selling ammo? :teeth
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Seriously... this guy had what seemed like all the calibers that a gun store would carry.

russ69 said:
I think it says Keihin right on the sides of the carb, don't think those are Mikuni smoothbores? It's not a hand bent Yosh pipe either, those are very rare and the header pipes are cut and welded sections, lots of them. Memory is fading but it looks like stock carbs. Sudco will have what you need.
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No, it defnitely says "Mikuni" on the bodies. I'll pull them off and measure them up since I'll rebuild em. I did order a Sudco service manual. After looking at GS750 Yosh pipe images online, the shape is definitely Yosh. Theres one set of springs on the whole system, where the 4->1. I'll media blast it at work and see if there is stamping.
 
mdelosrey said:
No, it defnitely says "Mikuni" on the bodies. I'll pull them off and measure them up since I'll rebuild em. I did order a Sudco service manual. After looking at GS750 Yosh pipe images online, the shape is definitely Yosh. Theres one set of springs on the whole system, where the 4->1. I'll media blast it at work and see if there is stamping.
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It's been a long time my memory is fading. They look like production carbs that were on Kawasakis. I was thinking racing smoothbores that were often used on Suzuki race bikes. They were bigger than 29mm(I think). Yours look small. The racing smoothbores didn't have enrichners or an idle circuit, if I remember correctly. But Like I say it's been so long I probably forgot the details.
Yeah, that's a Yosh pipe for sure, just doesn't look like the racing handmade ones.
 
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Little Update

Once I started tearing into the bike I could stop taking stuff off. Its now down to bare frame probably spent 2x what I paid for motorcycle on new parts. It'll be better than new when its done.

NAKED:
4grp5l.jpg


DE-TABBED:
156pled.jpg


BLASTED:
207m1l3.jpg


REBUILT MULHOLLAND SHOCKS:
2mgulx0.jpg


MISCELLANEOUS PARTS BLASTED:
eb4uip.jpg


REBUILT FRONT CALIPERS:
x4koev.jpg

2yulm54.jpg


Acquired some VM28 pumpers along with a handful of NOS parts. Bought some Stainless bolts and what not.

14lugk5.jpg

2ngwmq0.jpg

5ow49c.jpg


Cylinder head and Cam cover are currently in Ultrasonic cleaner overnight. I'll blast the fins on head and block then paint the lower section of block black. So raw and black engine, inputs? It currently has polished side cover which I will re-polish and install NOS round badges. Wiseco overbore head gasket on order. Its comin along.
 
Hey, watch out when cleaning those parts after blasting. That media/grit gets everywhere, and sometimes is very hard to get out of little crevices, and I've known more than 1 guy that his clearances were opened up immediatley when the bike started, and all that grit came loose and circulated the engine. Double/triple/quadruple clean all that stuff. You've got what appears to be a fun little project, and if done right, can have some pretty good power. The cylinder head is where all the power is. Getting a good port job, and making sure it's got a very good valve job on it, will guarantee a good running, durable bike.

Good luck,.
 
corndog67 said:
Hey, watch out when cleaning those parts after blasting. That media/grit gets everywhere, and sometimes is very hard to get out of little crevices, and I've known more than 1 guy that his clearances were opened up immediatley when the bike started, and all that grit came loose and circulated the engine. Double/triple/quadruple clean all that stuff. You've got what appears to be a fun little project, and if done right, can have some pretty good power. The cylinder head is where all the power is. Getting a good port job, and making sure it's got a very good valve job on it, will guarantee a good running, durable bike.

Good luck,.
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Thanks for the advice, we have a parts washer also. Its like a media blast except its for washing parts after media blasting. I will also use compressed air to clean up. Hopefully that'll be enough cleaning. Motor has Yosh cams and 69MM pistons. Head looks to have been ported and I'm looking into OE valves specs to compare to whats on there.
 
mdelosrey said:
Thanks for the advice, we have a parts washer also. Its like a media blast except its for washing parts after media blasting. I will also use compressed air to clean up. Hopefully that'll be enough cleaning. Motor has Yosh cams and 69MM pistons. Head looks to have been ported and I'm looking into OE valves specs to compare to whats on there.
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But check this out. All that media from the blaster, is going to be circulated in the parts cleaning solution/solvent/whatever it is. Take a hose and bucket of hot, soapy water to everything after you've solvented it off several times. You'll see lots of foreign particles coming off of there.

I used to work for a Top Fuel race team. They didn't bead blast internal engine parts for just this very reason. That stuff gets every where.
 
Thanks for sharing the build man! Look forward to seeing that beauty back out on the road.
 
corndog67 said:
But check this out. All that media from the blaster, is going to be circulated in the parts cleaning solution/solvent/whatever it is. Take a hose and bucket of hot, soapy water to everything after you've solvented it off several times. You'll see lots of foreign particles coming off of there.

I used to work for a Top Fuel race team. They didn't bead blast internal engine parts for just this very reason. That stuff gets every where.
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Got it, Ill take as many steps as I can. Water hose, Hot tank, compressed air, and repeat.

stoltzf4 said:
Thanks for sharing the build man! Look forward to seeing that beauty back out on the road.
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Same here. I just can't wait to ride again.
 
Cool beans, enjoying the pix and info. :thumbup



.
 
me, too!

gold rims ... drool
 
Papi said:
Cool beans, enjoying the pix and info. :thumbup



.
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Hey Papi, word on the streets is you're the GS guy! So far it's coming along. I'm sure I'll need your help down the line.

GPzPop said:
me, too!

gold rims ... drool
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Yeah, I'm trying to think of a way to clean/polish em up without removing the gold anodize. Any ideas?


Heres the block after fins were blasted and coated. The head came out of the ultrasonic cleaner and blasted the fins on that also. The combustion chamber was polished to a mirror shine and the int/exh ports were also ported and polished, I'll post pics of that after several more hot tank and compressed air sessions.
10cstpe.jpg
 
Very tiny update

So I got these cam cap/covers. Apparently 1 of 2 sets in existence, dunno if there's any truth to that. A machinist made a set for his bike and one extra set. After some light polishing I think they look cool.
2d6odih.jpg
 
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