Why not just buy a 1989 YZ tidler and then build it that way round, Weight the flywheel, lower the compression, Generator, lights, Gear it up?
250 Hours on a top end? Good for a summer,
@Calum It's very inferior to the 3XP-4BF WR200. No Aux boost ports and very tame port timing.
@mhbikesnbits I'm liking the project man, should be sweet! The 3ET lump with some breathing mods will make a nice road going 2stroke. It's a very unstressed engine, plenty of torque down low. Kind of want one as well,
I didn't like the damage to the crankcase and the price of that one, but a good project base, keep us posted.
@Calum Pint sized Unicorns ay,
would have to be a lunatic to spend that much on an old Yamaha... *Cough *Cough
Old copy I got from July 2015, must have bought it for a reason...
Lunchtime read for you jabronies.
@harveymg Hi Harvey,
Firstly, I've never had a 170kit. But have ridden one. I would recommend looking at tuning a 3MB or 4FU barrel and cylinder head rather than spending £450 on the Athena kit.
I had a tuned TZR 134cc engine with Mikuni TM32 and Ignitech ignition upgrade, and it would pull hard to 85mph in 5th gear, all around the same cost as an Athena Kit alone.
The port timings on the 170 kit are seriously underwhelming but can be modified properly though,
My advice, have a gander at tuning the 125. It was a blast, and relatively inexpensive.