And then there were two.. 1976 GT250 Rebuild

Little update. Ran the cases through the dish washer to dissolve what soda was left from blasting
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After soda blasting, i took the jugs for a fresh bore and hone. Big shout out to mototech USA in mansfield. I dropped them off Tuesday at around 11, and picked them up Wednesday around the same time. He said that is usual turn around for him, and in my humble opinion, he did a great job. I highly recommend his services!
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Got the crank squared away with new outside seals. Asked a few well respected area mechanics, and they said the bearings and inside seal looks great and have a ton of life left in em. While I hate to not replace them while it's apart, I hate spending a tick over 5 bills to rebuild something that doesn't need rebuilt.

Bottom case got a final scrub and it's back on the stand
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Got the guts all back in harmonious union. Picking up some yamabond tomorrow to glue the old girl back together.
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Not to toot my own horn (and I know it's not done yet, so knock on wood) but I'm pretty happy with myself. This is the first motor I've torn down, rebuilt and re assembled completely on my own,and the first motorcycle engine in general. I gotta thank all the great people on here for things I've picked up, and to my old man for all the things he has taught me through the years.
 
Rock on bro!! That's a good one to break the ice on, the ones that split vertically and half the transmission falls out when you least expect it are fun too :eek:
 
hurco,
Mototech USA in Mansfield,OH..;what do they charge for boring out and finish honing a cylinder? Do they finish them off w/ fine grit(like 400 grit?)stones ? I haven't been able to find a local machinist I can trust here around Pittsburgh,PA. just yet and wondered what they're getting for their work in Mansfield,OH.
Do you have a clear/close-up pic of a finished cylinder ?
 
grcamna5 said:
hurco,
Mototech USA in Mansfield,OH..;what do they charge for boring out and finish honing a cylinder? Do they finish them off w/ fine grit(like 400 grit?)stones ? I haven't been able to find a local machinist I can trust here around Pittsburgh,PA. just yet and wondered what they're getting for their work in Mansfield,OH.
Do you have a clear/close-up pic of a finished cylinder ?
Click to expand...
He charges $35 a hole, match bored to the Pistons. I am unsure of the exact grit that he used, but I'll try to get a better pic later on. You could always give him a ring (419) 512-3588
 
grcamna5 said:
hurco,
Mototech USA in Mansfield,OH..;what do they charge for boring out and finish honing a cylinder? Do they finish them off w/ fine grit(like 400 grit?)stones ? I haven't been able to find a local machinist I can trust here around Pittsburgh,PA. just yet and wondered what they're getting for their work in Mansfield,OH.
Do you have a clear/close-up pic of a finished cylinder ?
Click to expand...
This is about all the better of a pic my phone will take
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Thanks hurco,Nice looking job there & the price is excellent;I'll give them a call.Do they have regular hrs. 5 days a week ?
 
grcamna5 said:
Thanks hurco,Nice looking job there & the price is excellent;I'll give them a call.Do they have regular hrs. 5 days a week ?
Click to expand...
Hey no problem. He is a one man show, but said he usually works til 5p.m. or so. I am happy with the results, and he seems like a straight shooter. Let me know how it turns out for ya
 
Spent a good day with the family up at cedar point, a big amusement park about an hours and a half north. While it was fun, I was itching (and not just from the sun burn I was aquiring) to get something done on the bike.

I gave the case bolts a good soak in "the works" cleaner. They came out pretty nice, then a little thread cleaning with a wire wheel got them well straightened out.
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Then sealed and mated the cases, after double and triple checking the transmission guts, bearings and seals.
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Waiting for the right gasket set to show up, since I bought the wrong one a while back (oops). Hopefully then I get finish buttoning up the motor. Gotta clean and polish or paint the side covers yet too. I'm leaning towards aluminum colored paint at the moment, as polishing just ain't my thang. Lol
 
xb33bsa said:
champher the portholes goddammit,very,very lightly on the transfers nice radius on the ex.
Click to expand...

Do you think a quick couple 'run-thru's' w/ a ball hone would do it for him?
 
grcamna5 said:
Do you think a quick couple 'run-thru's' w/ a ball hone would do it for him?
Click to expand...
NO :mad: :( ???
what is there now should be a near perfect precision sunnen honed bore,a ball hone will just fuck it all up
it is some simple handi hand work to dress the ports by hand
 
xb33bsa said:
NO :mad: :( ???
what is there now should be a near perfect precision sunnen honed bore,a ball hone will just fuck it all up
it is some simple handi hand work to dress the ports by hand
Click to expand...

Well O K..
 
Yep xb I was thinking what Tune-A-Fish was thinking about the deck. Never thought to break the burr on the ports, or I should say I never have before lol
 
Kick start, clutch and junk re installed! I'm getting excited now. There is a small light at the end of this tunnel lol
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