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Fuel-oil mixture ratio ? 81 IT175
Posted February 20, 2009 - 07:13 AM
Posted February 20, 2009 - 09:22 AM
By the way that bike is way too clean. It's a dirt bike. Get some dirt on it!
Posted February 20, 2009 - 01:06 PM
Posted February 21, 2009 - 04:33 AM
If that's a recent photo, you got a nice bike.
Yes, Yamaha recommended their Yamalube R at a 20:1 ratio.
The formulation of Yamalube R was different back then.
The bike would probably be fine with a modern oil (like today's Yamalube R) at a more common 32:1, though you might have to do a minor rejet of the carb.
I used to own the same model, although the one I bought (around 1990) was a classic basket case and made a nice project.
I fixed it up to good condition and even did the Yamaha Wrench Report modifications that came out for the 1980 IT-175G (same model in blue and white color, basically).
The mods were aimed at adding low end power and torque while keeping the top end the same or stronger.
I bet that these bulletins (actual paper publications) can still be found at a Yamaha dealer that was around back then.
Posted February 21, 2009 - 06:09 AM
I have it insured through the same company that does my antique cars . I am going to plate it as historical so I can zip down the road if the mood hits. Also planning on doing a couple of AHRMA post vintage cross country runs with it.
Thanks for the tip, I will look for the upgrade spec sheets .
Posted February 21, 2009 - 06:28 AM
Posted February 21, 2009 - 02:04 PM
Posted February 22, 2009 - 06:34 PM