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Honda CR

  CR250

CR85/CR125 Suggestions:

Both are great bikes but can be made better with some basic mods.

GREEN is the minimum we suggest for this model
RED is our top pick for trail/enduro
BLUE is our top pick for MX

GainsMods
Package 1Bottom-Mid-TopSetup headBuy Now
Package 2Bottom – MidSetup head + machine cylinder baseBuy Now
Package 3EverywhereSetup head + V ForceBuy Now
Package 4EverywhereSetup head + V Force + standard portingBuy Now
Package 5Everywhere, especially mid-topSetup head + V Force + advanced portingBuy Now

 

CR250 Suggestions:

Pre 2002 CR’s have great, strong engines but can benefit from setting up the head.
After 2002 they are renowned for big midrange power but soft bottom end and top end. This is mostly due to a poor head design which also results in fouling plugs and detonation (especially 05-07 models).  These models definitely need the head setup and can also benefit a lot from a Keihin PWK carb swap as well as a V Force reedcage.

GREEN is the minimum we suggest for this model
RED is our top pick for trail/enduro
BLUE is our top pick for MX

GainsMods
Package 1Bottom-MidSetup head  (fixes detonation and plug fouling)Buy Now
Package 2EverywhereSetup head + 38mm PWK carbBuy Now
Package 3EverywhereSetup head + V Force + PWK carbBuy Now
Package 4Everywhere, especially mid-topSetup head + V Force + PWK carb + Advanced portingBuy Now

 

CR500 Suggestions:

The legendary CR500 has huge bottom end and midrange but signs off early at around 5,800rpm. The stock carb can also be difficult to tune, especially the low speed circuits. Some sensible mods can give it a much smoother, wider spread of power with about 10hp more at peak… when setup like this its actually much easier to live with.

GREEN is the minimum we suggest for this model
RED is our top pick for trail/enduro
BLUE gives the best spread of power and is our top pick for MX or serious trail riders

GainsMods
Package 1Bottom-MidSetup headBuy Now
Package 2EverywhereSetup head + 38mm PWK carbBuy Now
Package 3EverywhereSetup head + V Force + PWK carbBuy Now
Package 4Everywhere, gives broadest spread of powerSetup head + V Force + PWK carb + Advanced portingBuy Now

 

Or combine your own package of mods:

ModGainsPrice
Head Setup Everywhere, plus reliability $260
Standard Porting Everywhere $240
Advanced Porting Everywhere, esp mid-top $350-$400
Carb Oval Bore Mid-top $250
Dyno Tuning Everywhere, plus reliability $350 for first 3 hours
V Force reedcage Everywhere, plus throttle response $175-$200 approx
Big Bore kit Everywhere, esp bottom-mid $1200-$1500 approx
Cylinder base machining Bottom-mid, often slight loss of top $110
Specialist Labour Get us to rebuild and tune your engine $110/hr