Hi Cameron. Engine looks awesome. However you need to remove that washer you fitted to the power valve lever arm. It needs to have free play to allow the arm to rotate around the shaft it is on. This is so that the arm opens & closes the power valve via the spring. As well as enlarging & restricting the exhaust port to alter power output as you mentioned, the power valve is positioned above the port to allow the valve to change the port timing. This is the main way it alters the power output. Port timing effects the power a similar way to valve timing on a four stroke engine. In cars they call it Variable Valve Timing (VVT). So the power valve is the VVT of two strokes.

"that thing came flyin outta there, it caught me by surprise. kinda like last night" LMAO

This is dope, great lookin engine Cam, “I call this the double nut technique”

The man is back again, complete with dirty jokes ahaha

The amount of innuendo in this video hahaha. Also, I'm so glad you kicked cancer's ass! Thanks for the fantastic content!

You can just tell by the intro that he’s doing soo wel and is happy 🙌🏼🙌🏼

can’t wait to see this bike done!

Cameron: whats crackin guys My engine: oop that's me

Your vids always inspire me I’d like to see a yz250 build for the next one

Love the videos! You’ve taught me many tricks that I can use on the old stand ups I’m restoring for my channel! Keep producing the great content! Hope I can get my channel like yours one day!

Absolutely incredible Cam. To look at where this engine was to where it is now is mind blowing! You're the best!!

Nice!!! Im looking forward to watching! You are the only one who make a 35 minute video and it be so easy to watch the whole thing!

Great to see this build again dude, really digging the RM on the channel🤘 I have said it before, but you are an inspiration dude, not just what you have been through, but what you do on your channel, I been around bikes along time, am a car guy and into my 4wd off road projects, your attention to detail, work process and explanations are second to none, you don’t take short cuts, don’t miss the small details where I feel allot of others focus on big mods, bling eg pile etc and miss little things, like new studs or head bolts, cleaning detail, the work you did on the PV parts for example, not just this build, if anyone wants to learn how to work on bikes they should be watching your vids and filming too dude, while sometimes time lapse might appear useful you rarely do that and hence allot of important steps are not missed, for me anyway as a gear head, it’s almost therapeutic to watch your builds, even though I have done it myself many times, but we learn from each other, why I watch and have watched many channels over the years, talk to engine guys even if can pick up one thing, it’s invaluable ime, do anyways dude, thanks again for keeping it Pryme, can’t wait to see and hear this bike rip. I would love to this this and your CR250R rip around your track for a couple of laps before you give it away, someones going to win a great bike. Grip it and rip it y’all, be safe keep her distance and right side up 🤘🔥

Sweet!!! I'm so far behind on my 93RM250 build but it's so cool that you are walking me through!! Thanks Cam!!

Just what i needed after a long day working in healthcare. Crazy times at work, but coming home and seeing this vid makes me forget everything. Keep up the good work!

man great video as always. liked how you showed the parts dropping time after time. showing us no projects is ever perfect. I appreciate all the tips you always share. RM is coming along looking better than new

I appreciate your depth of detail in your rebuilds.

Simple and Clean. Just the way a two stroke should be. Good Job Cameron.

Great video Cam! Been here for a while and loved every bit of it! We’re slowly building our shed so I’ll be able to start doing rebuilds again finally!

I love how detailed you guys are with your builds you Neimela boys build some dope stuff.

Wow! That engine is a work of art ! Can’t wait to see it all come together . 👍

This has been an experience for sure the kids and I love the videos such a learning experience!!! Keep up the great work that you do

Watching you put together that powervalve really makes me appreciate my 02 cr250s powervalve setup. So much more simple.

Great to see this video, its been a weird summer so this project captures my attention in a productive way that has a useful potential,.... Fittingly, the step by step explanations are synched to my wonderment..... Looks amazing, like you said better than new. Thanks

Amazing work! Did not expect the brushed aluminum to look that great!

Cannot wait to hear this beauty run!!! Looks gorgeous!!

Great video and so stoked about this build. Looking super great man and hope you are in good health.

That engine looks so amazing. Really nice work. The video series has been excellent as well

Lookin’ good. Can’t wait to see this bike completed!

Really enjoying your vids in the UK, keep em coming Cam

Cam the man! I am in the middle of a Cam style rebuild atm. Coming along great with all the details you provide making it easier in so many ways. From the tools you use to many many links and tips ... can not say thank you enough! I see a Cam restoration/ performance shop in the very near future! Pryme Racing! Think about it ! All the best. Sean

I bought an 01 rm250 3 weeks ago. I'm using your videos along with a clymer to fully rebuild it. Your videos are informative and entertaining. I can't wait for the next one. Oh yeah... "that reminds me of last night"

Dude, you’ve motivated me through my build. Not as extensive as yours due to lack of funds, but a huge learning experience. I have an 07 RM 250. Wish I could post pictures on here. Also, just learned you’re in Spokane. I’m from Colville and am stationed in Fort Lewis. Too cool. Thanks again, bro👍🏼

Chill bro, can't wait to see bike done!!

The quality of these videos never lets me down...can't wait to take mine to this level of beautifulness! 🔥🔥🔥

Finally yes yes yes 👍 Stay safe in these times peps

Man this is one of the sickest looking motors I’ve seen !!! Awesome job keep doing your thing !!!🤘🏼

Oh my God that looks amazing, these videos are awesome man! Can't wait to see it done, and good luck to all of you who have entered. Wish I could have a bike all pretty and nice like your man, maybe some time.

Just when u think an engine can’t get any cleaner, then u make it even more clean it’s amazing, good video

These videos are my favorite, I could watch them all day. I need to get another project bike soon. I just finished a polaris rzr170 that im going to surprise my little brother with. Now its time for another bike.

Bro I’m always so hype when you drop a video. You never disappoint. As always your work and craftsmanship is Pryme

Nice build!!! Very nice head with the adjustable volume combustion chamber!!!

Yo cam- idk if u have ever read any of my comments but i attempted my 1st ever bottom end rebuild on my 02 rm250. Bro my bike started today!!! 2nd kick!! Thanks for the step by step instructions. Man ur vids are gold to guys like me. Im so stoked. Thanks again brotha

I've watched alot of build videos and yours are the best and most thorough by far.

Looks nice af bro can’t wait to see finished article stay safe out there cam

Basically, I want the engine. How excited am I to see the bike. Amazing 💥🇬🇧

Yessss, i was waiting for this video 😏 you are amazing Cam!

Cleanest engine builds out there.

Great! You're back! Missed your videos.

I've been watching your videos and noticed how nice these engines come out or the nice work you do on everything. So I thought , wow! you should do engines for people , I sure you'll get many customers.

cameron man wow another rm 250 rebuild ,that was the cleanest engine ,thanks

You are an inspiration man, i loved your videos and the detail.. Craig job on this motor.. From Panama

Mann I would have been pretty lost if it wasn’t for this video and your last video on this rm build. Thank you for posting full build bolt for bolt. I picked up a rm 250 completely broken down. And your videos made the rebuild a breeze. 🙏

Love the video brother as always! Hope your health is restored and stay strong! Keep the videos coming as they are such a huge inspiration to so many. God bless my friend.

Beautiful engine! That tool you're looking for is a Box end crows foot! You can get them with 1/4", 3/8" or 1/2" drive ratchets, extensions and torque wrenches.

Looks dope as f man really love rm's can't wait to see this finished 🤙

Rad indeed. By the work one knows the workman. Excellent!

Man the detail is great looks good let’s see some body work soon ready to see what you have plan for the body

Wow! I feel kind of guilty for watching this for free. Seriously, this feels like a class I should have paid to take. So thank you! I really enjoy your videos and always look forward to the next one. You inspire me to better myself, and I'm thankful that you are doing what you do. God bless you and your family!

Nxt to how to do things..U also teach us patients n no shortcuts! And thx for giving that awesome bike away....U rock.

I'm pumped to see this bike done

Sick build. Man I love watching your rebuild vids 💪

Your videos are always so informative cam, love it!

The mix of dirty jokes and humor is one of the reasons I love your vids man 😂🤟🏽 I'm in the pnw too!

Great build man, I really like this series!

Man your work is always so clean and awesome!love it,engine looks amazing 🤙

Another great vid Cam👌 currently working on a vintage 1986 RM250 build! PS. Ur products are awesome and I luv my "A lil dirt won't hurt" shirt!

“Yes, she’s tight now....no more second hand parts” 😂🤟

Motor looks awesome! Great job Cam!!

love the 2stroke builds I've learnt a lot off your vids keep up the mint work. and another thng it would be pretty cool if you did a 4 stroke build next

Love these videos have been watching for years inspired me to create my own KZfaq channel🤙🏼 and start doing some project bikes

AWESOME MAN, perfection, God bless Cam & family, and stay strong man🙏👏👏👏❤from🇬🇧

This engine is sick dude! Keep up the great work

This bike is going to look crazy great job

Thank you,very tactful well presented lesson,I can follow and understand,but do it myself ,not able to remember all.You are an excellent tutor.Again thank you.

Can’t wait to see this all finished

Man that is beautiful.... I am hoping and praying it ends up in my garage!!!!!

Damn I wish my RM motor looked like that, sooo puurrty!! You are the man Cam, thanks for doing what you do!

I’ve been waiting so long for this video. It sucks that you had upload troubles. Love your vids every time man, keep up the quality work.

Amazing detail love it, probably best to use same oil on piston for fitting as your running in fuel.

So looking forward to picking this bike up and meeting the legend himself!

Your honesty amazing it makes me exited to work on my bike

Top notch content dude this is where I come to learn how to wrench on bikes. I can’t wait to hear that thing rip. I’m debating my next restoration I’m thinking 99-02 kx250 or 93 yz250.

Beautiful work mate

Sheeshh what a masterpiece beautiful love your work and content hope all is well much love from Connecticut

That engine looks like a beast! Well done

Spider-Man drops an engine on a table “wheelie time”

Always top quality work, great to watch 👌

Another clean build ✋

Awesome work dude

That engine looks sick! I need to check on that cerakote for the power valve 🤔 keep it pryme 👌🏼

Once again... looks amazing man 👍🏻👍🏻

Broo so hyped I’m in the exact same steps as this with my zukie rm 125 she’ll be up ready tomorrow just waiting on that lectron to shipp! Lettssss gooooo >:O

Love the videos cam, good quality as usual. As for the your nuts, on the cylinder that is. Motion pro make a torque wrench adapter tool that will make your torque wrench fit on the cylinder nut in the power valve orifice.

Cameron, I have been watching your video's for a long time, I have subscribed of course, and even though this is my first comment to you, I just want you to know, you are doing a fantastic job, please do keep up the great work, I really do enjoy your video's and the commentary, you Rock!

That engine is going to look amazing on the bike. 👍

So clean it looks like a diamond

Looks mint!!!! Wish that other head was for my 01 rm125. Looks like I might have to buy one.

Your videos are amazing! Keep up the great work. Cheers!

Great video man you do super clean work