Nathan’s MotorSport Repairs

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Nathan’s MotorSport Repairs I provide high quality repair services for all motorsports including dirt bikes, ATVs, sxs, and snowmobiles. Contact me today!

Located outside of Harlan, IA📍 Drop off is most convienent for my facilities but can come to you for extra charge.

09/16/2026

Upgraded this 2024 KLR650 by installing an aftermarket timing chain tensioner along with a valve adjustment and oil change📶

Appreciate doing business Scott✅

09/02/2026

This 2019 YZ250F came in for a top end rebuild due to power loss.

After doing so, customer was both surprised and impressed with its amount of performance gain📈🔥

Appreciate doing business Joe✅

*UPDATED*Here is my service list including the main repairs with labor charges set to them.These labor charges do not in...
09/01/2026

*UPDATED*

Here is my service list including the main repairs with labor charges set to them.

These labor charges do not include the part prices will need to order- they will be additional to the price already shown. Parts and their costs also vary by brand and where they are sourced from so customers are given these options.

Also don’t have all services I provide listed- all others will be quoted.

Space fills up fast so contact me today!

This Polaris 90 2 Stroke came in due to it not wanting to start. I noticed when I turned the gas on to try to start, it ...
08/27/2026

This Polaris 90 2 Stroke came in due to it not wanting to start.

I noticed when I turned the gas on to try to start, it would leak gas out the float bowl drain screw due to the drain screw not sealing all way.

After cleaning out the carb and finding that the float bowl screw was worn and float bowl gasket was dry rotted, the customer and I decided it would be cheaper overall to just replace the carb👍🏼

I got the new carb installed and finished looking over everything by tightening up the chain.

Now it’s young rider is excited to get back to zooming around again🤘🏼🏁

Appreciate doing business Brandon✅

08/25/2026

This 2002 Arcticat 570 got brought in due to the customer not being able to get it to run properly after years on and off messing with it📆🛠️

I diagnosed the jets in both carbs were the wrong sizing and didn’t match each other along with gas puking out the float bowl over flow tube and the needle not being properly adjusted.

After I got the carbs cleaned and synced up, it ran better than before but still not how it should. I kept diagnosing and found the new fuel pump that had been recently installed was not properly primed which wasn’t allowing the pump to suck fuel. I also found that the crank case breather hose was loose on the ni**le allowing it to suck air causing hard starting.

Once I got those all set correctly and replaced the fuel filter just to be safe, it started right up with one pull and is now set for the winter season coming❄️🔜

Appreciate doing business Michael✅

While catching back up on all repairs I had in, I didn’t get much time to picture my work for every one so I apologize i...
08/24/2026

While catching back up on all repairs I had in, I didn’t get much time to picture my work for every one so I apologize in advance. I am finally back on track with everyone currently coming in so everything will be in and out again↪️🙌🏼

I also didn’t get many pictures of this bike’s work due to the rushing of time as stated above❗️

This 2005 KX250F was brought in originally for 3 things which included a front fork suspension rebuild, lowering kit installment for rider, and valve cover gasket replacement. After getting those done, customer wanted me to quickly look over bike to make sure it was good to go.

Once I did so, came to find out it had loads of problems, and not small ones either❌

I found it had extremely low compression (I could push the kick starter over by hand) to the point where it simply wouldn’t even start. I tore the top end apart and found the cylinder was scored and the head was severely warped.

Once I replaced the cylinder and head and got it started, I then found out the cluch was completely worn out in which it would stall when put into gear. I pulled the cluch basket and plates out to find the plates were worn and the basket had deep notches in it beyond repair.

I also found while I was in there that the inner cluch case had been welded with cracks spreading past the welds.

While the cases were split, customer decided she wanted a new crank installed. Since I was already going through the work, she also decided she just wanted a bottom end rebuild with fresh gaskets, bearings, and seals. Doing so, I as well had to replace the water pump shaft due to scoring and the carb due to corrosion, (I couldn’t even get the jets removed).

Lastly, I finished it up by replacing the break pads, clutch cable, and chain.

Now with the bike fully rebuilt after initially coming in for a few minor repairs, it’s ready to take after tracks how it used to in its younger years again🛞💨🔥

Appreciate doing business Jay✅

07/09/2026

This 1994 Polaris 400L was brought in because it didn’t want to idle.

I diagnosed it had low compression along with leaking crank seals, and cracked carb cylinder boot. I replaced the cylinder due to bad scouring and also rejetted the carb after doing so💨 I also installed a new piston because of the low compression and crank seals due to them leaking📉💧

Although it still had some tinkering left to do, the customer was overall satisfied with the major repairs I made so that he could fix the remaining minor ones himself👌🏼

Appreciate doing business Eric✅

06/15/2026

This 2006 CRF450R was brought in this past Friday morning for a last minute front fork suspension rebuild due to severe leaking forks.

Customer had plans to get out on a track over the weekend and stated other repair shops weren’t able to have it done in time❌

Although the rebuild kit arrived later in the afternoon, I got the seals and bushings replaced along with fresh fork oil just in time for their trip that evening💯👌🏼

Appreciate doing business David✅

06/11/2026

Here was a 5 hour job installing new rear CV axels on this 2015 Polaris Sportsman 570 quad.

With my previous experiences installing any other aftermarket makes of these, I recommend customers to choose OEM so they bound to last and not wear out as fast as any others I’ve seen do🙌🏼

Appreciate doing business Brandon✅

06/08/2026

This 1990’s Polaris 250 got brought in due to the owner not being able to get it running in the last 5 years. I ran a diagnosis and came to find it had low compression.

I pulled the top end apart and inspected the cylinder was scoured and had worn piston rings. Because of this, I did a top end rebuild along with replaced the cylinder and piston and rings.

I also installed a used head due to it being badly warped and unrepairable and new carb due to it being corroded and rusted with the jets seized in not being able to be removed.

Now it starts right up and sounds as good as it did in the 90s again⚡️🤟🏼

Appreciate doing business again Caleb✅

Address

M16 Road
Harlan, IA
51537

Opening Hours

Monday 9am - 6pm
Tuesday 9am - 6pm
Wednesday 9am - 6pm
Thursday 9am - 6pm
Friday 9am - 6pm
Saturday 9am - 6pm

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