My email for ordrering trash cans and if you would like to help out on the builds. Thanks Polaris.trashcan&gmail.com

Todd, I learned so much from this series. I am in the process of restoring a 1980 txl 340. I find your videos inspiring as I struggle through the restoration process. I’m not sure if I will rebuild the motor yet but will definitely rewatch this series if I do. Thanks again for taking the time to do these videos.

Thank you Todd.

I built a flywheel holder out of a old starter cup. Just weld a piece of angle iron on the face and smashed the other end for a comfort grip handle.

Wiseco always run 'em loose, especially on trail sleds and absolutely lots of warm up time, they're just not forgiving and why we never used them in customer sleds. For our mini-sprint dirt track engines and ice or asphalt drag sleds, actually just ran Kimpex cast pistons, they were cheap, consistent and held up as good as anything- but that was 30 years ago, so who knows about import quality anymore. Glad you noted ring pins to intake side, because I've seen mis-stamped arrows many times and never trusted them, keep pins to intake side and you'll always have it correct. Another reason I liked the aftermarket pistons, they used the e-clip style for the piston pins, way better than standard c-clips.

Again Todd great engine build series! 😊

Use larger diameter rope in the cylinder to torque the flywheel.

Did you put the wrist pin clip in off camera on that last cylinder

For torquing my fly wheels being I have 1000s of rewind cups I just use a small bar to hold. I have used rope also. Either or works. I just prefer the bar through the cup.

Can't wait to hear them fired up!

My understanding is the difference between a cast vs forged pistons is the forged will expand more than a cast since the forged actually contains more material in it. I always run more piston to cylinder clearance with forged pistons. All engines need some type of warm up before running them hard.

Lots of folks think with a "best" mentality and don't think in the "pros and cons" mentality. They ask what is the "best" piston without considering usage. Cast and forged pistons have different features with different pros and cons. Glad you discussed this with the Wiscos. Since I rent out my sleds, I just run SPI so I don't have to worry about people warming them up like Wiscos prefer.

A former friend of mine bought a 92 RXL. We got it to run but it wasn't good. Tore the engine down. 4 out of the 6 rings were installed wrong. They were oem pistons and keystone type rings.

Can't wait to see them both finished!!

just thought i put this out there if you are trying to convert a rxl engine to carb and cant find carb boots from a 91-92 650 minkuni vm38x200 carb boots will work if you drill out the bolt hole from 8mm-10mm and they are easy to find plus pretty cheap i wasnt able to find polaris carb boots that would work for the life of me so i wentb through as many boots as possible till i found these and ordered them up and worked mint with minor modification

Love the great info--on all your builds!!😊

Todd I ported the Indy 600 cylinders and used them on the centurion 500 for a big bore set up and with the right carbs and jetting, hang on wheelie machine

🔥great stuff.. really enjoying this engine build videos. Chassis are looking good Trent. Nice work buddy 🔥👊🔥🔨🏍⚙️⚠️

A dial bore indicator is an awesome investment fore piston clearance especially with forged pistons because it can show deviations from the top to the bottom of the cylinder. I had a skidoo that had 0.006 at the top and 0.002 at the bottom

Polaris pistons are cast , and wiesco are made of a billet or other material, cast pistons grow in a different rate than Wiesco cus of different materials , Todd is absolutely right about letting your sled warm up before giving it the beens

I use pro x pistons Mainly if there available

A lot of people don't know that forged pistons expand different from cast pistons. The 01 cylinder was the best HP making piston port engine. A tip for installing for wrist pins is put them in the freezer and warm the piston up in the oven on a very low temp. I found it makes a bit easier.

"A guy should not have to cut the edge of his head gasket off so they dont overlap."😂😂 You had me cracking up. Awesome series once again. Im still trying to talk you into a 1200 mod. 😁

ok you have convinced me that i need a 650 in one of my sleds....haha

Another very interesting and informative video. Great job, and thank you. These are really interesting. Keep up the great work buddy 👍

Great serious, makes me regreat selling my 88 indy650 sks for 500 bucks 20 some years ago..

Nice work and determination! Bought a piston stop for a 2stoke dirt bike . Synthetic tip slug screws into sparkplug threads on ur polaris.

Triple clyd, trip carbs, trip pipes. Todd is the man!! MAGA 2024!!!

Your not wrong about the gaskets. They shouldnt need any modification to work as intended. On a side note, I could take bastard off your hands if that would help ya😂😂🍻

You leaving the stock skis or going plastic? Good work on the engine Todd.

I should 650 swap my 04 rmk

100% people aren't checking the clearance on the piston to cyl wall clearance. They will check the ring gap and neglect the piston. SPI pistons are close to OEM for clearance's.

I didn't t see you put the second snap ring in on the last cylinder

No bearing retainer clips for the pistons???

Wouldn’t a dab of grease hold the alignment piece in the hole? I use the same trick when in doing water pumps on outboard motors to keep the pin in place

Are you using new oil pumps on rebuilt engines or can you rebuild the oil pump? Couldnt find any new ones when i was looking.

I have that same fuel filter on a 1970 AC Panther 399 Kohler. Issue is sucking flat the primer bulb. I am running that filter the opposite way. Now I`m wondering if mine is backwards...Hmm

good video keep them coming. not sure what year it was in the 650 but the bore and stroke were really good and it made alot of power that one year

Can the rope get cut?? Have pieces inside cylinder

Giggled when you were trying to open that pin with freshly grease fingers

im sure you're aware but with any wiseco piston, from my experience, always make surre the Ring index pins are tight if they are loosely fitting, some red loctite works perfect

👍👍👍👍

on your water pump there a line in on the carb side mine dont have that would that be an older styel pump or ?? and i have a pump like yours dose wich would be better ??

Think you missed a circlip. Usually there a pain to put in. There no way you put it in with your thumb. Lol

Why wouldn't you just use a piston stop?