Just picked up an hs40

[Dipstik82]

for the most part they were mainly Canada sold. The engine again was from another canadian Bike made by S.E. Woods, Who knows, maybe if its a small town you can locate that bike as well.

So what engine would this bike have come with ?

 

[markus]

So what engine would this bike have come with ?

stateside versions of that bike sold by eastern enterprises were sold with a 3hp, or as a roller only, many other companies did the same with them. I have only seen adds with complete bikes from Keystone. Somewhere I think I have an add with the round number plate from keystone, but I cant find it offhand to verify what it had for HP. the add I have with the integral square forkplate (same bike different year) lists it has having a 3.5hp through Eatons. Those bikes were Taiwanese imports and the engines were fitted by the Company that purchased them usually.

an HS40 is externally the same size/shape with only difference of exhaust placement so if your block didn't get damaged during the bending of the valves and you can salvage, It would be a good fit other than having a slightly older look than a 1971/72 version engine would have had.

 

[scrappybunch]

Wouldn't that leave some "forensic evidence" Iike scratched block or messed up plug threads?

OOOHHHH wait! Clothes line or soft rope in the cylinder, through the plug hole, and a big long breaker bar on the flywheel nut might do that.

Good thought!! I agree, and without any marks on the valve, had to be the old rope trick.

 

[Dipstik82]

Hey, would it be possible to put a 2spd clutch system or a torque a verter on this bike? Lots of hills at my place lol

 

[sparkwizard]

Yes it is possible. Does it have 4 threaded bolt holes in the side cover near the clutch? If it does, an aftermarket TC should bolt on.

 

[sparkwizard]

Good thought!! I agree, and without any marks on the valve, had to be the old rope trick.

@Triley41395 actually suggested that, reminding me of the trick. He saw it first.

 

[Dipstik82]

Yes it is possible. Does it have 4 threaded bolt holes in the side cover near the clutch? If it does, an aftermarket TC should bolt on.

Yes it does

 

[sparkwizard]

As stated, you should be able to bolt an aftermarket torque converter right onto your engine, install chain and ride.

 

[Dipstik82]

As stated, you should be able to bolt an aftermarket torque converter right onto your engine, install chain and ride.

Nice

 

[Dipstik82]

Would it be worth it to port the block on this engine? I notice the ports around the valves are horribly cast with lots of sharp angles etc.

 

[Dipstik82]

Another keystone for sale up here. Looks like they did have the hs40's
m

 

[markus]

Another keystone for sale up here. Looks like they did have the hs40's
View attachment 306582 View attachment 306583 m

Note the location of the Exhaust and intake is reversed compared to an HS40, It is an H25-30-or 35 not an HS40. As I had stated in a previous post, Specs on the version with the fixed/solid forkplate version It should be an H35

 

[Dipstik82]

Note the location of the Exhaust and intake is reversed compared to an HS40, It is an H25-30-or 35 not an HS40. As I had stated in a previous post, Specs on the version with the fixed/solid forkplate version It should be an H35

Solid fork plate?

 

[markus]

Solid fork plate?

. Your version has the bolt on round number plate, that one has the square plate that’s integral to the forks.

 

[Dipstik82]

. Your version has the bolt on round number plate, that one has the square plate that’s integral to the forks.

Ah, is one preferable?

 

[Dipstik82]

Is it normal for these engines to have the compression release on the intake cam not the exhaust? I thought they always used the exhaust to release compression for easier starting?

 

[markus]

Is it normal for these engines to have the compression release on the intake cam not the exhaust? I thought they always used the exhaust to release compression for easier starting?

On the HS40 it was, October 1967 through 1970. It was due to the placement of the intake nearest the cam gear. So the mechanical release could be used. Into 1971 they dropped the MCR cam and only offered a BCR (bump compression release) on the exhaust lobe.

 

[Dipstik82]

On the HS40 it was, October 1967 through 1970. It was due to the placement of the intake nearest the cam gear. So the mechanical release could be used. Into 1971 they dropped the MCR cam and only offered a BCR (bump compression release) on the exhaust lobe.

Ok so this engine is definitely an early 1970 engine