CR125...'99 Cylinder on a 2000 lower end

Todd Kageals · Joined: 15 Jun 2012 Posts: 271

Guys,

I have just finished my first stock moto build (complete '99 engine with new cylinder/crank/bearings/piston/etc.). I am now ready to build a second engine for "stock Honda" for my other kart (dad will be driving this one). I found a pretty good deal on a 2000 lower end. Can I just slap a '99 cylinder on it? If so, is the 2000 lower end legal for stock Honda?

Thanks,

Todd

Tyson Henry · Posted: Thu Jan 03, 2013 10:57 am Post subject:

Yes, legal and identical.

powersportsplus.com has 10% off going on till january 17th on any order over 150.

Steve Eady · Joined: 26 Jul 2001 Posts: 956

Yes but a 2000 engine is a 5-speed trans, unless it was built out of a kit engine.

Steve @ www.extremegokarts.com

Jason Berry · Advertiser Joined: 29 Dec 2001 Posts: 295

Todd,

When you ask 'legal" what rules are you building the engine too?

If you are using SKUSA rules, the cases and transmission would be legal, but you will need to replace the complete ignition system, intake boot, and reed cage to 1999 components.

You do not need to change the cylinder under SKUSA stock moto rules.

If you decide to bolt on a 99 top end, the bolt pattern for the cylinder is the same. You will need a head to go with the cylinder.

Jason
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