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Discussion Starter · #1 ·
I have a 2009 Rancher 420 AT. I have noticed that the rev limiter activates when the atv reaches 53mph. I do not have a real issue with that but I do when the limiter activates on a hill climb or when trying to cross a muddy area. Is the a way to remove the rev limiter?
 

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it's programmed into the ecu/c.d.i./pcm, no way other than maybe putting a power programmer on there ?, other than this ? ( if it can be done even ? ), I don't know of anyway to get around the rev limiter.
 
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I don't think so....... I called ricks again got this > cdi 15620 is for 2000-05 (no) rev mod built it -and the 15621 is basically the same with a cooling fan wire pig tail. My two coppers worth :) sure someone else here can add ......

Mr Rick should be back end of this week phone# 18005210277 let us. Know what they say if you call... Samuk has. String on this cdi subject ......
 

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How about changing gear instead? That’s usually the answer when you hit the limiter, not always possible I know.
 

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Discussion Starter · #6 ·
Leave the rev limiter bud...


Get a bigger faster bike instead of wearing out that 420 prematurely..

My two pennies right there..
I've got a canam 800 but some times I like to ride the Honda if the group that I am riding with is not wanting to ride fast.
 

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Leave the rev limiter bud...


Get a bigger faster bike instead of wearing out that 420 prematurely..

My two pennies right there..
This is good advice. Rev limiters are your friend. They stop the user from throttling past the the engines ability to make torque. You would need to modify other components as well in order for you to gain anything from higher rpm's. Valve springs are usually the first to fail, valves begin to float. Also, bearing tolerances come into play when considering raising the redline.
 

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Leave the rev limiter bud...





Get a bigger faster bike instead of wearing out that 420 prematurely..



My two pennies right there..


This is good advice. Rev limiters are your friend. They stop the user from throttling past the the engines ability to make torque. You would need to modify other components as well in order for you to gain anything from higher rpm's. Valve springs are usually the first to fail, valves begin to float. Also, bearing tolerances come into play when considering raising the redline.


Honda is pretty conservative with their rev limit, other mfg's are too. It's pretty safe to say it could handle another 800-1000rpm without any issues. I have the rev limit on my Renegade set around 800rpm over stock, and have ran a couple Honda's with rev limiters 1000rpm past stock


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Discussion Starter · #10 ·
I am aware of not over reving the push rod engine. What I noticed was that it will run about 47mph in 5th gear at 1/2 throttle. When the revlimiter kicks in at 53 mph it is still gaining speed and building power. I am using top speed as an example because it is easy to explain. I really careless about speed but the engine is still making power and not just reving for no reason. The limiter just seems to be set too low. I can live with it but I thought it was worth asking about.
My canam 800 is faster with 1 plug wire removed.
 

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I am aware of not over reving the push rod engine. What I noticed was that it will run about 47mph in 5th gear at 1/2 throttle. When the revlimiter kicks in at 53 mph it is still gaining speed and building power. I am using top speed as an example because it is easy to explain. I really careless about speed but the engine is still making power and not just reving for no reason. The limiter just seems to be set too low. I can live with it but I thought it was worth asking about.
My canam 800 is faster with 1 plug wire removed.
Not fair comparing that Rotax twin to the little 420 thumper. :icon_ poke: However, I can make my 420 do 150 mph with the plug wire removed...about 7 seconds after I push it off a 750 ft cliff (yes, I did the math). :wink
 
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