1973 360rt

Finally found a 2023 360 motor. Just no head, cylinder or piston. Can I use a 76/77 cylinder and head on this lower. I can't seem to find one for the 1973/4/5 years. Thanks Chris

Let me look.I do have a wr450 motor if your interested

Thanks Auto but I have 2 450 motors, but I would be interested in a low number 450 MJ frame for my 2021 0008 motor. Got the new 2023 motor from a great guy in Missouri. Now the search for the cylinder, and head. Husqvarna-parts has pistons. So I was wondering if the later parts would work on my old motor with or without modification.

I'm not sure that newer top end will fit. The rt has the big cases. I have a 73 rt as you can see by my pic to the left.

So the large case 360 ended in 1975? Looks like I'm gonna have to be very patient. I just cruzed online and saw a cylinder and head pretty cheap but they are for the 75/77 years. does that compute?

Hey disonny, nice bike.

I think 73 may have been the last of the bigger cases. I have a 75 wr250 and it has the smaller cases. I'm sure the 74 mag had the same as my 75

The 450 and 360 were the new generation 5 speed "Big Motor". They had larger cases then the 250-400. They say they made RTs up to 75 but most were left overs form 73. I have a 360 and 250 Rt if have any other questions.

So I've got to have a 73 only cylinder and head? Can I use a different year head? I feel like this might hurt a little!

The 360 RT definitely won't accept the later year cylinders. Ironically though the 360RT will accept the 72 - 75 450 cylinder as the stud patterns are the same (see pics) and I think the RT case opening for the barrel sleeve is the same as the 450. But all this 450 to 360 exchange stuff is of no value to you because the stroke differs.

Come to think about it the 360RT also accepts the 69 - 74 400 cross piston. You may find this useful when shopping a piston.

Since the stud patterns are the same and the sleeves are the same OD, I think a 450 head fits a 360RT barrel too. But the issue of the crush depth comes into question.

72 - 73 360RT barrel on the left (6mm hole in the sleeve was a for a compression release HVA never fully implemented)
and 73 450 barrel on the right.




Below in the foreground is a 360RT I restored and sold to the Moto Armory.

The 1974 250WR and 400WR and 1975 400WR were the last large large case engines before becoming fully superceded by the GP based MAG and GP Crs introduced in 1975

I have a 360 cyl and head but I think it's 4 speed I'm in SJ if you want to take a ride down and check it out

Thanks guys, I guess in the end I'll need a year specific 1973 cylinder and head. Crash that bike is beautiful, way beyond what I'll do to mine. Auto how far south, supposed to dump tomorrow.

Don't forget the 460. Ha, kind of funny HVA would come out with a 460 motorcycle that had the same 450 engine they had been selling since 72. I always thought it was Huskys last attempt at unloading a larger than expected inventory of 450 components.

So the 1973 360rt cylinder is a one year only part? I'm not getting it yet, 72 360on the oval case, 74 360 on the gp case?

All the four speed oval case models ended in 71, the five speed 360 RT was sold 72 - 73, and the six speed 360 GP was sold in 75 - 76. Does that cover your question?

The 360GP was a factory prototype in 1974, went into production in 1975

Thanks for the info. Looks like I'll be searching for only 72/73. Just what I needed another obscure project. Uhgg. If anyone has a cylinder and head, I'm interested. Thanks everyone. Chris

Someone is selling a head for 70s 250 or 360, looks like it has 4 holes for studs. Anyone know the measurement difference of the cylinder relief between these two? I'd like to have the seller measure so I don't end up with the wrong part.

well, at least you will known as "obscure husky master"! impressive!
perhaps if you get another husky it could be a 250, or a later 430