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New 1976 TY175 Project

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Replied by MarkT on topic New 1976 TY175 Project

Great work! Congratulations!!!
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
06 Sep 2017 16:39 #71

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Replied by SlowPoke on topic New 1976 TY175 Project

Hey all. I finally got my XL175 done and sold and made a nice profit to dump into my DT1,2,3 fund. I've been working on the "little white ballet bike" (as my wife calls it) for the last few days. I received my piston kit from Yamabits and took it and my cylinder down to Mott's Machining here in Edmonton to have a re-bore done. 2 day turnover, $100.00 bucks and job done. I'm hoping to clean it up and get it painted today. My new clutch internals came in from Yamaha OEM and they have been soaked in oil and installed. while polishing the cases on that side I decided to take the time to remove most of the casting mould lines. The previously severely scarred pieces turned out really nice in my opinion. I did the same on my triple trees and feel it really makes a difference to the look of the bike. These pieces were designed to look good and function well by a passionate design team and I feel that removing all of the casting marks honours their original intent. My new oil pump is installed and it was a nice personal moment adding the appropriate fluids to the crankcase and the autolube tank. I've started looking at the carb. It's calling to me. Uh oh.
2018 Suzuki Vstrom 1000XT
2014 Yamaha Bolt
2009 Yamaha XT250
1977 Yamaha DT250
Hammond Organ
Fender Bass
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Last edit: 03 Oct 2017 09:49 by SlowPoke.
03 Oct 2017 09:42 #72

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Replied by SlowPoke on topic New 1976 TY175 Project

So I took the carb apart yesterday and, of course, what a black gooey mess. All of the jets were cloggedand needed a long soak to finally get cleaned out. Everything is now spotless and the needle looks nice and clean with no corrosion. I've ordered all new o-rings, seals and gaskets from Yamaha. They will be in in a week so hopefully the carb will be all daisy fresh soon.
I picked up my piston but I need a bit of advice on the process of gapping the rings and installing them. Could someone explain the best process for this?
2018 Suzuki Vstrom 1000XT
2014 Yamaha Bolt
2009 Yamaha XT250
1977 Yamaha DT250
Hammond Organ
Fender Bass
Last edit: 05 Oct 2017 11:09 by SlowPoke.
05 Oct 2017 11:05 #73

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Replied by Wheel mad on topic New 1976 TY175 Project

Take a ring and put in the top of the bore and push it down with the head of the piston to a mid point between top of bore and the exhaust port. Using the piston makes sure that the ring is square in the bore. Measure gap with a feeler guage. Ring end gap specs should be onsite somewhere. If thats all good, detemine which way up the ring is meant to be. Should be in manual.
Some have a mark on the ring to indicate up. Now the fun part, I usually hold the piston in hand but you may want to hold it in something... gently.
I put one end of the ring against the pin in the ring groove then using one thumb to open the ring up use other thumb to work the ring around and down over the head of piston. Move that ring to bottom groove and start again. Hope that helps
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05 Oct 2017 12:52 #74

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Replied by SlowPoke on topic New 1976 TY175 Project

I was curious what the gap tolerances should be.
2018 Suzuki Vstrom 1000XT
2014 Yamaha Bolt
2009 Yamaha XT250
1977 Yamaha DT250
Hammond Organ
Fender Bass
05 Oct 2017 14:59 #75

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Replied by Rexs Speedshop on topic New 1976 TY175 Project

You just need a shiny new ignition now :-) :-) :-)

www.rexs-speedshop.com/epages/es143131.s...Electronics/TY_Parts
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06 Oct 2017 06:47 #76

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Replied by MarkT on topic New 1976 TY175 Project

SlowPoke wrote: I was curious what the gap tolerances should be.


If you can't find the TY specs and someone else doesn't have them, I would be very comfortable using the DT175 ring end gap specs.
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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06 Oct 2017 07:29 #77

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Replied by SlowPoke on topic New 1976 TY175 Project

Thanks Mark. That makes sense. It's my understanding that the piston is almost a dt175 piston anyway.
2018 Suzuki Vstrom 1000XT
2014 Yamaha Bolt
2009 Yamaha XT250
1977 Yamaha DT250
Hammond Organ
Fender Bass
07 Oct 2017 18:20 #78

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Replied by SlowPoke on topic New 1976 TY175 Project

Rexs Speedshop wrote: You just need a shiny new ignition now :-) :-) :-)

www.rexs-speedshop.com/epages/es143131.s...Electronics/TY_Parts


.......and, of course, you are right. So perfectly right.
2018 Suzuki Vstrom 1000XT
2014 Yamaha Bolt
2009 Yamaha XT250
1977 Yamaha DT250
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07 Oct 2017 20:51 #79

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Replied by PDXtyist on topic New 1976 TY175 Project

Hi Racerclam.
What mods do you recommend on the TY175C?
Thanks
23 Jan 2018 21:47 #80

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