CRF300L Big Bore
Engine Services
Engine Services
Couldn't load pickup availability
We offer full engine services from big-bore installs to crank swaps (for those converting CRF250s to 300s), and even complete engines for sale. Drop your bike off at our shop in Long Beach, CA, or ship your motor (we have a proven packaging recipe) and we'll get you taken care of.
Shoot us a message to discuss your project.
Customer Reviews
I have 2 motorcycles that started out as stock 2021 CRF300L Rally's. The first one I purchased new and built it up with Ari's 301cc kit. Right after it was broken in, I left for vacation doing the WY BDR, Red Desert BDR-X, and the Black Hills BDR-X. The bike performed perfectly, great power off-road and on on-road, even fully loaded with a Mosko Moto Reckless 40L setup and full moto camping gear. I was riding with 2 others that had T700's, there was no problems keeping up off road (even leading the way with a lighter and more nimble bike) and on road I wasn't too slow either.
Even before that trip I was talking to Ari regarding the tuning of that engine as I went with a custom tuner in the Dallas TX area. I found out that he was in development of a 316cc kit. I knew I wanted that for my 2nd bike. I have adult son's and wanted them to be able to come with me on some adventures along with my other riding buddies.
I made plans to travel to the Long Beach CA area and have Ari build the engine with the 316cc kit and new head with 2mm oversize intake valves and everything else. I even had a Rekluse TorqDrive clutch pack installed in it. Ari's shop rates were reasonable and competitive. He provided updates as he went though the build and even he was impressed by the rest of the build on the bike. His attention to detail showed in all that he did. He even chased a few threads that were in need of that on the body bolts.
Ari did the proper break-in of the motor as part of his service. And the motor and bike put a smile on his face as he was able to wheelie it from 2nd gear to 4th
I recently did a 200 mile adventure day through the Big Bend area of TX. The run on FM170 was a blast. The ride into BBRSP to the Solitario was a blast. The bike handled the TX desert just fine. Fuel economy was still good as about 67mpg's for that day.
If you look at the total cost to either upgrade the CRF300L Rally to make it into the mythical unicorn do all you want it to versus starting out at a higher price point of a different bike and then spend to make it fully adventure ready, I think the value of upgrading the CRF300L Rally is still a wise choice, and have done so with my money twice
I ordered a big bore for my crf300l, tried installing it myself but had nothing but issues. Ari was working with me very closely to try and figure it out but every single time I’d fix somthing a new issue would appear. I decided to just ship the motor to him and have him fix it. He sent me a photo on how to pack the motor and it was super quick and easy. I had absolutely 0 problems shipping it there and receiving it. He ended up throwing on a whole new big bore along with resurfacing the head. He was sending me photos and showing me what he found throughout the entire process. It only took him 2 weeks to get everything done and ship it back out. Since throwing it back in, I followed his break in procedure and just been ripping it having 0 issues. From talking to him I’ve learned that he’s been working with this engine platform since 2011 so he knows absolutely every little bit about it. I thought shipping my motor off to get fixed would be this big hassle and take a long time but Ari made it super quick and easy to where it wasn’t even a thought in my head. Can’t express how happy I am with his service.
I had a CRF250L that I wanted to convert to 300. I'm pretty mechanically inclined but didn't feel comfortable splitting the cases to change the crankshaft. Ari built me just a 300L bottom end so that I could change all of my parts (clutch, rotor, etc) over to it. He had it built and shipped in just a few days! Def recommend working with Ari because he knows the motors so well and is able to provide whatever you need.
I had Ari build me an entire motor for my CRF300l. We spoke on the phone to figure out the build spec and he kept me updated as the head got ported and the bottom end went together. Then he shipped it across the country to me and I couldn't be more pleased with the power. It's everything I was looking for in this build. He was a true professional from start to finish, and I would highly recommend him for any mechanical upgrades for anyone looking to improve there bike's performance!
Customer Reviews
I have 2 motorcycles that started out as stock 2021 CRF300L Rally's. The first one I purchased new and built it up with Ari's 301cc kit. Right after it was broken in, I left for vacation doing the WY BDR, Red Desert BDR-X, and the Black Hills BDR-X. The bike performed perfectly, great power off-road and on on-road, even fully loaded with a Mosko Moto Reckless 40L setup and full moto camping gear. I was riding with 2 others that had T700's, there was no problems keeping up off road (even leading the way with a lighter and more nimble bike) and on road I wasn't too slow either.
Even before that trip I was talking to Ari regarding the tuning of that engine as I went with a custom tuner in the Dallas TX area. I found out that he was in development of a 316cc kit. I knew I wanted that for my 2nd bike. I have adult son's and wanted them to be able to come with me on some adventures along with my other riding buddies.
I made plans to travel to the Long Beach CA area and have Ari build the engine with the 316cc kit and new head with 2mm oversize intake valves and everything else. I even had a Rekluse TorqDrive clutch pack installed in it. Ari's shop rates were reasonable and competitive. He provided updates as he went though the build and even he was impressed by the rest of the build on the bike. His attention to detail showed in all that he did. He even chased a few threads that were in need of that on the body bolts.
Ari did the proper break-in of the motor as part of his service. And the motor and bike put a smile on his face as he was able to wheelie it from 2nd gear to 4th
I recently did a 200 mile adventure day through the Big Bend area of TX. The run on FM170 was a blast. The ride into BBRSP to the Solitario was a blast. The bike handled the TX desert just fine. Fuel economy was still good as about 67mpg's for that day.
If you look at the total cost to either upgrade the CRF300L Rally to make it into the mythical unicorn do all you want it to versus starting out at a higher price point of a different bike and then spend to make it fully adventure ready, I think the value of upgrading the CRF300L Rally is still a wise choice, and have done so with my money twice
I ordered a big bore for my crf300l, tried installing it myself but had nothing but issues. Ari was working with me very closely to try and figure it out but every single time I’d fix somthing a new issue would appear. I decided to just ship the motor to him and have him fix it. He sent me a photo on how to pack the motor and it was super quick and easy. I had absolutely 0 problems shipping it there and receiving it. He ended up throwing on a whole new big bore along with resurfacing the head. He was sending me photos and showing me what he found throughout the entire process. It only took him 2 weeks to get everything done and ship it back out. Since throwing it back in, I followed his break in procedure and just been ripping it having 0 issues. From talking to him I’ve learned that he’s been working with this engine platform since 2011 so he knows absolutely every little bit about it. I thought shipping my motor off to get fixed would be this big hassle and take a long time but Ari made it super quick and easy to where it wasn’t even a thought in my head. Can’t express how happy I am with his service.
I had a CRF250L that I wanted to convert to 300. I'm pretty mechanically inclined but didn't feel comfortable splitting the cases to change the crankshaft. Ari built me just a 300L bottom end so that I could change all of my parts (clutch, rotor, etc) over to it. He had it built and shipped in just a few days! Def recommend working with Ari because he knows the motors so well and is able to provide whatever you need.
I had Ari build me an entire motor for my CRF300l. We spoke on the phone to figure out the build spec and he kept me updated as the head got ported and the bottom end went together. Then he shipped it across the country to me and I couldn't be more pleased with the power. It's everything I was looking for in this build. He was a true professional from start to finish, and I would highly recommend him for any mechanical upgrades for anyone looking to improve there bike's performance!