Are there any performance parts for ut400?

[lincolnsq175]

Ive searched and cannot find any performance parts that fit my machine.

I have a 2020 coleman ut400.

Im looking for machined sheave kit, programmers, cdi, exhaust and intake.

I know these are yamaha rhino clones but are they rhino 450 clones?

 

Any info is appreciated.

[Charles Hines]

JMHO, but I think you bought the wrong machine if you are looking to hop something up. Whatever you could do wouldn’t overcome the fact that you have a single speed un changeable gearing in a 1100 lb platform powered by a little “400” engine. Most owners focus on noise reduction and trying to make it more comfortable. 

[lincolnsq175]

I got the machine basically for free with a blown engine. I rebuilt the engine, replaced crank, cylinder, piston and timing chain. It runs good and has a top speed of alittle over 40. It seems to me that the engine is a clone of a kodiak 450 efi, so i figured parts for them should work. I know it will never be fast being a 400 but wanted to get alittle more pulling power out of it.

 

[Charles Hines]

Can’t disagree with getting all you can out of it. If you do find anything performance oriented, let us all know.

[lincolnsq175]

Im going to start with a machined sheave and secondary spring kit from jbs.

Then will get a slip on exhaust and hmf fuel programmer. 

Kn intake and see how that goes.

Will keep u guys updated.

[lincolnsq175]

Im in the process of fabricating hard doors. Heres the progress so far.

[aefron88]

Let us know if you find parts that fit. I believe it's a rhino 450 clone, but not sure if engine parts are swappable,, AND I've yet to read any definitive reports of anything swappable.

The engine tune is adjustable via HUD ECU hacker software, which is free. Just need about $25 in cabling and the time and knowledge to play with the fuel mapping.

Here's my explanation on how to get HUD ECU hacker working on these rigs and what you need

That having been said its a 400 so you wont likely squeeze much more out of the engine.

[lincolnsq175]

Thanks alot for that info about tuning thats very helpful and i will keep you updated on my progress.

[lincolnsq175]

Im pretty sure yamaha 450 engine parts are swappable cause i have built a few of them before and just rebuilt this engine. Its identical to yamaha 450 and 400 engines.

[aefron88]

Good to hear. There are a few parts that seem to be problematic, like the timing chain, on these motors. I figured if I ever need to cross that bridge I would try and see if the Yamaha timing chain would fit as a more reliable replacement.

[Dan_Lockwood]

On 1/8/2023 at 5:57 PM, lincolnsq175 said:

I got the machine basically for free with a blown engine. I rebuilt the engine, replaced crank, cylinder, piston and timing chain. It runs good and has a top speed of alittle over 40. It seems to me that the engine is a clone of a kodiak 450 efi, so i figured parts for them should work. I know it will never be fast being a 400 but wanted to get alittle more pulling power out of it.

 

You may want to use your cell phone GPS app to clock your speed and compare it to the speedo in the UT400.  I did this and it's almost 10 mph off.  Speedo read 42 mph and the GPS was 33 mph.  I really don't think they're very accurate.

[Tricky]

I know I am late to the party but, am I wrong to assume the pursuit for more power was fruitless? I have been fighting mine for a while. It runs now but will lose power and die. Then will restart without issue. I am waiting on my second plug wire as this latest one has cracks and will arc to the frame or motor. If this does not do the trick I think I may just replace the coil as it acts like my old Ford did when the coil was failing. I do wish there were upgrades for more reliable operation. Short of a turbo or NOX I doubt more power is capable. I am sure someone out there has dropped a whole new power plant in to one but I have not seen that yet lol 

[PrimetimePowersports]

On 3/3/2025 at 10:37 AM, Tricky said:

I know I am late to the party but, am I wrong to assume the pursuit for more power was fruitless? I have been fighting mine for a while. It runs now but will lose power and die. Then will restart without issue. I am waiting on my second plug wire as this latest one has cracks and will arc to the frame or motor. If this does not do the trick I think I may just replace the coil as it acts like my old Ford did when the coil was failing. I do wish there were upgrades for more reliable operation. Short of a turbo or NOX I doubt more power is capable. I am sure someone out there has dropped a whole new power plant in to one but I have not seen that yet lol 

There's no replacement for displacment! 

I can do that for you BTW. Put any engine in it you would like.