KartDen

2-Stroke Engines

Reed-valve and rotary-valve kart motors. KA100, Mini, Micro, Rotax Max, X30, ROK, Leopard, KZ, Yamaha, and the other two-strokes people actually race. Pipes, carbs, clutches, ignitions, jetting, rebuilds, and class-rules questions that hit the motor. Post if you wrench on one, race one, or are trying to pick which 125 or cadet motor to buy.

11 posts — page 1 of 1

Recurring issues with the KA100

by kosmic52 on 2026-10-04 13:24:01

Upvotes: 1 · Downvotes: 0 · Comments: 2

Steam cleaner, worth it for cleaning a radiator

by clutchnsun70 on 2026-10-02 18:30:02

Upvotes: 0 · Downvotes: 0 · Comments: 1

Real world performance from the IAME X30

by F4st2a on 2026-09-26 14:48:41

Upvotes: 2 · Downvotes: 0 · Comments: 3

Does KZ or IAME 175 SS or SSE replace Honda CR125?

by Arrowemm66 on 2026-09-25 22:00:45

Upvotes: 1 · Downvotes: 0 · Comments: 3

Identifying engine, plus the problems it has

by leopardxp3te91 on 2026-09-20 17:11:43

Upvotes: 2 · Downvotes: 0 · Comments: 3

Melted piston on a KZ R2

by birelingdaily67 on 2026-09-13 10:49:03

Upvotes: 1 · Downvotes: 0 · Comments: 4

Trying to decide on a Lipo battery for x30

by joel_lap29 on 2026-09-11 15:19:10

Upvotes: 1 · Downvotes: 0 · Comments: 4

How do Jetting Changes work on a Comer c50/c51?

by Jesselli79 on 2026-09-03 22:43:24

Upvotes: 0 · Downvotes: 0 · Comments: 1

Vortex Rok GP octane, what's your take?

by shifterxbrad41 on 2026-09-01 20:33:04

Upvotes: 1 · Downvotes: 0 · Comments: 2

What actually causes an engine blow up?

by lapdriver93 on 2026-09-01 17:14:47

Upvotes: 0 · Downvotes: 0 · Comments: 2

Anyone still racing the KT100?

by kart86 on 2026-08-27 05:03:20

Upvotes: 0 · Downvotes: 0 · Comments: 2

kt100 usa yamaha