1. Dirt Bike
    2. Parts
    3. Engine

    1998 Yamaha RT100 Engine

    1998 Yamaha RT100
    Tire Size:
    Front: 2.50-18, Rear: 3.00-16
    Spark Plug:
    BR7ES
    Stock Chain/Belt:
    420x104
    Stock Gearing:
    Front: 14T, Rear: 48T
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    Wiseco
    Pro Lite Piston Kit
    $102.19
    $89.99
    You save $12.20 (12%)
    (12)
    Wiseco Pro Lite Piston Kit Available for both two stroke and four stroke bikes, the Wiseco Pro Lite Piston Kit is both a great OEM alternative and an easy way to boost the power. Choose stock bore siz
    Wiseco
    Replacement Ring Set
    $34.95
    $31.99
    You save $2.96 (8%)
    (2)
    Wiseco Replacement Ring Set Wiseco offers a complete range of popular piston models and years for both trail and racing applications Durability, longevity and increased horsepower Each ring set is

    Latest Reviews

    Jake (Colchester, CT)

    Fit
    Quality
    Installation
    Recommend

    Was good...

    Fit great and was an easy installation but blew it first time I took it to the track.

    Davey (South Central, WI)

    Fit
    Quality
    Installation
    Recommend

    Great Deal

    2008 FZ1- Fit perfectly, no 'big glob of glue' on the end holding the magnet in. Nice black finish, we'll see if it holds up. Same exact length as stock. I'm actually kind of excited to see what it pulls out of the oil at the next interval. Cheap insurance, money well spent!

    Sean (Los Angeles, CA)

    Fit
    Quality
    Installation
    Recommend

    Replaced the top end on my 96 cr125r! Fit great perform well but the price is the problem. For 70-80 bucks they'd be perfect!

    Mike (Concord, NC)

    Fit
    Quality
    Installation
    Recommend

    Hammerhead Engine Plugs

    These fit perfect, and look great on the bike!! They do not come with O rings so you will have to use your oem ones or buy new ones but they are only a couple bucks- definitely worth the money.

    J (LI, NY)

    Fit
    Quality
    Installation
    Recommend

    125cc kit

    I had this athena kit on my 2003 yz125 and the bike ripped. Probably was the fastest 125 Ive owned and it ran stock exhaust only other engine mod was vforce reed. I called it the blue demon :p

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