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Makotosun

I saved a YZ125c top end

  • Youngdrakeo
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I saved a YZ125c top end was created by Youngdrakeo

These parts wore literally going in the bin due to fin damage. So I snapped them up.
He through in the head too. Said it was off a dt
Received them to find its still on its std bore.
And the head is from a yz125F
Vapour blasted them today. Came up great.
Now I'm going to try fit them to my 73 175 bottom end!
Now I don't know what the crankcase volume difference is between a 175 and a YZ125.
What carb should I run? Stock yz is a 32 I believe?
I have a spare keihin pwk28 or a modified vm34 off my 175.

Need to track down a piston. Carb mount and reeds next.

Going to be interesting!

73 CT3 modified, 74 AG175 MX, 79 YB100 x2 , 79 GT 80 ,2015 ducati scrambler ,honda CT70
The following user(s) Liked this Post: Enduronut
07 May 2020 03:33 #1

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Replied by RT325 on topic I saved a YZ125c top end

Wow, hope that all works out looking forward to hearing how it performs. Looking at the pic before cleanup, the cylinder stud spacing looks different to the head but hope it's just my computer screen.
07 May 2020 05:12 #2

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Replied by Youngdrakeo on topic I saved a YZ125c top end


Same bolt pattern only difference is the head stud size.. Bigger on the 175.
Might have to modify the frame of the 175 as the spine gets in the way of the carb
73 CT3 modified, 74 AG175 MX, 79 YB100 x2 , 79 GT 80 ,2015 ducati scrambler ,honda CT70
07 May 2020 05:32 #3

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Replied by MarkT on topic I saved a YZ125c top end

Crankcase is the same on the 125 and 175.
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
07 May 2020 06:32 #4

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