hs40

I recently picked up a lighted Rupp engine that was supposed to be "easy to get it going". Turns out, it's seized up and to top it off, the end of the flywheel side of the crank was cracked. When I put a flywheel puller on it, it busted the threads. So that I can get this engine going and...

Here's the deal: I have a 1971 HS40 with cheap knock off carb. Engine has new points, condenser, and misc. gaskets. The good: Engine starts very easy, idles well, and sounds really good. Runs good at wide open throttle The bad: Engine has a low-mid rpm miss/hesitation. It also produces a...

I'm doing a hop up of an HS40 at the moment and I wanted to report my findings on billet connecting rods for these engines. Nowadays, nobody sells new billet connecting rods designed for the HS40, along with its under bored and over bored siblings, the H35 and HS50. ARC racing does sell a billet...

I need a crank for my Tecumseh....It came off a 71 Rupp Roadster

I have a 71 Tecumseh HS40. I broke the threaded end off of the crankshaft:hammer:....(my own dumb ass fault)....I gotta get a new one....Can anyone tell me the Tecumseh part #.

Hs40 coil and flywheel pulled from a 70' Rupp Roadster. $115 shipped

I have a Tecumseh hs40 with the model number Hs40-55565k Ser 8300b I would like to know the production year Thank you

So I picked up a '71 speedway scorpion a few weeks ago with the original HS40 lighted coil engine and I'm having trouble getting it to run. After some extensive searching I thought I had the problem figured out. When I got the bike the motor wouldn't fire at all and after checking everything...

1972 Hs40 with lightning coil. Engine ran good and lights works. No smoke. Cleaned up and painted engine gloss black with engine clear coat. Rupp decals applied before clear. Carb might need a rebuild. Has correct slant intake and oil cap dipstick. I did not add oil and gas to run after paint...

Doing my first complete engine build on a HS40. Do these valves look right. The valves are new,engine block is new but the lifters are not and neither is the cam. The space seems to large. I will get a larger feeler gauge set tonight but wanted some opinions. Thanks-Mike

Gonna be hitting some HS40/50's ive been stock piling and none have intake manifolds on them. But ive been picking those up too. I just want to confirm the one on the left is the HS50 and the right is HS40. Also, if so, of these two HS40 intakes, is there any advantage the shorter or...

Hey, I've been searching and searching for a replacement carb for my HS40 55363D motor and I cannot not find a clear answer on which carb to get. I went to OldMiniBikes warehouse and they said there was an OEM one available but for around $80. Is there a universal knock-off carb I could use? Thanks

I changed the points and the condenser, new plug,cleaned the carb, valves seam good. Starts off starts off starting fluid but after that nothing. I am really getting sick of these Tecumseh engines. Any ideas? Maybe timing?

For Sale ,I have a early 70's HS40 back plate with throttle hookup,this came off a Ruttman from the early 70's. $25.00 plus $10.00 shipping Paypal Gift option :thumbsup:

For Sale I have a early 70's Tecumseh recoil cover off a HS40.this was on a Ruttman Number's model HS40 552978 Serial number 0175 04889 Asking $30.00 plus $10.00 shipping Paypal Gift option :thumbsup:

Getting my azz kicked with a Tec HS40 55290C serial 0302 12416, non lighted, on a Heald VT3. Spent 2 hours screwing with carb, finally put brand new carb on, still has same problem. Engine will idle fine, pulls wheelie just off idle, then lays down when you try to give it more throttle. It...

I picked up a Rupp Hustler project the other day, but I think it's too far gone for a proper restoration. This engine is original, but it has some issues. The coil wire has been cut or broken off, the shroud is dented and pitted (was cleared of all paint before I bought it), and it seems to...

looking for a ice flywheel for hs40 with lights mine has broken magnets and the plastic fan is broken

Like the title says, I'm looking for a Taylor Spark Arrestor for a non-slanted Tecumseh HS40. It's about 7" long, 1 3/8" bolt spacing on flange. Let me know what you have. Thanks Mike

The black one on the right. BEFORE . . . . . . . . . . . . . . . . . . . . . . AFTER