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TOPIC: Look what followed me home last weekend... '81 IT175H

Look what followed me home last weekend... '81 IT175H 17 Sep 2018 12:58 #31

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More parts trickling in...

Almost done with carb, just waiting on Power Jet o-rings...


New o-rings for petcock. Man, it is so much nicer now, lever is much firmer with new o-ring but turns nice and smooth

Hopefully that Honda screen works out
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Look what followed me home last weekend... '81 IT175H 20 Sep 2018 15:06 #32

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New brake shoes came in, got all back together and ready to go. I feel safer already...



Got the o-rings in for the carb so that's all buttoned up too...







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Look what followed me home last weekend... '81 IT175H 21 Jan 2019 12:27 #33

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Slow progress on the 175. Popped the head off I had a look at the top end and cyl walls. Everything looks pretty clean but the piston is std bore! After 37 years, wow. So message sent to EN for bore job...



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Look what followed me home last weekend... '81 IT175H 21 Jan 2019 15:28 #34

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Piston and head sure look clean. maybe a fresh bore.

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Thanks Mark
Roseville, Ca.

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Look what followed me home last weekend... '81 IT175H 21 Jan 2019 15:49 #35

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It does look clean. Really clean. It's pretty worn though, blowing fuel/oil mixture badly past the rings. I need to pull the cyl, check the ring gap and inspect the rod/crank bearings for play. The piston has quite a bit of rotational play so something's amiss. I'll dig into it further...

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Look what followed me home last weekend... '81 IT175H 21 Jan 2019 19:03 #36

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looks like a lot of wear around exhaust port,quite normal
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1957 Cushman Eagle 1969 Honda 90 ATC 1969 Honda CB250
1973 Yamaha AT3 1974 Kawasaki KH440 1974 Honda XR75
1975 Suzuki TS75 1975 Kawasaki GreenStreak 90 1975 Suzuki GT550
1975 Suzuki TS250 1976 Suzuki GT550 1976 Indian Chief
1976 Yamaha YZ80 1978 Yamaha IT175 1980 Suzuki GS550
1982 Yamaha IT465J

Look what followed me home last weekend... '81 IT175H 10 Feb 2019 11:48 #37

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Pulled the cylinder this weekend. After cleaning I found this...



No wonder the right side exhaust spring was missing.

Not sure what I'm gonna do. Thinking about filling the whole area in with JB Weld and re-drilling the hole in the same location. Any other ideas?
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Look what followed me home last weekend... '81 IT175H 10 Feb 2019 12:04 #38

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I think I would get someone to tig weld, fill the hole and groove, and drill a new hole.
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Look what followed me home last weekend... '81 IT175H 10 Feb 2019 13:02 #39

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Yep, thought about that too. Theres a place about 20min from me, I'll run it by them tomorrow

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Look what followed me home last weekend... '81 IT175H 11 Feb 2019 12:19 #40

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So I took the cyl down to a local welder/fabricator. 2 hrs later...

Hole/crack filled...





I drilled the new hole...


I thought about filing the raised weld down but I like that there's a bit of extra "meat" in that area now. Looks like it should hold up great, probably stronger than new.

Now off to EN for that bore job...
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