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Hey rob, switching wont make any difference in performance. The bpr5es one notch "hotter" so it may help burn off extra carbon. keep in mind how much the engine gets loaded down and brought up to full power and temp. if your just putting around with a lot of idling the bpr5 may run cleaner (even...

Custom manco thunderbird in granny smith green metallic. Runs great, rebuilt 3.5 Tecumseh. selling to get my son something bigger his knees hit the handle bars. $600obo, Baltimore, md. shipping not included, if you have a commercial account, I may be able to break it down into ups-able size boxes.

Briggs 5 hp, This is a late 70s generator spec. the crank was machined to 3/4" threaded and keyway added. My son ran this on his manco at windber last year. runs good, standard ignition, leaks a little oil. clutch not included $65 from Baltimore, md. plus shipping

what up.....check motion pro maybe a 05-0040, maybe you can use it to make one....

wanted: 5hp briggs crankshaft for my leaf vac..... 3/4", 1"pto and 7/8" flw. journals :thumbsup:

I had to print mine too.....

did you replace the shoes? The linings may be worn to the point the brake cam cannot reset itself when the brakes are released. maybe look over the brake cable and any springs.

if you end up swapping it out...post the tapered one up for sale, those can be repurposed, recut/ keyed to 3/4"od its not worth much but it is a good core

good ol' Dura-lock bolts and machined serrations at the mating surfaces, never had a issue with them once. I prefer the stud & nut setup, especially for reuse. plus theres a little room to play with clearance, sanding the cap surfaces for worn crankpins. be careful with those import pot metal...

nice bikes guys, I finished this one last year, 1985 CR500r first year water cooled.

if your getting into working on these little engines seriously consider buying a leak down tester, its a good way to look into a engine without pulling it down. if you eventually get any newer pull start engines, they are equipped with compression releases necessitating either spinning the...

Looking for a set of these triple trees: id be willing to purchase outright or trade my existing triples running XR80 forks.

is the point cam attached to the flywheel? post up a photo if you can

are there any rust marks on the crank near the keyways or the flywheel where it looks like the key contacted it? or line up the point cam in relation to tdc (points opening)

that's a unique spec. looks like the pto shaft is slightly longer than a standard engine....no biggie, the model numbers are on the silver air shield or the pull starter housing. briggs make a cap to cover dipstick hole p/n 691363. the flywheel and housing may be wider than usuall, to...

Oregon used to be silver streak mfg. engine parts are imported, unless Oregon has improved quality, they are substandard.

china carb, you should certainly open it up and check the jets. they may be properly marked and drilled wrong, or vice versa, or not marked at all. stock sizes are main= 140, pilot = 17.5, the needle jet and jet needle only come up as part numbers, even if they are off you should still be able...

hopefully its not the rod, you could verify by putting the old wheel back on...I wonder if it could it be the magnet moving up against the roll pins as it passes the coil? I have a arc flywheel that makes noise, its the magnet only noticeable at idle. there is more advance built into the arc...

yeah that's weird, like it came from the factory 20 over? is the old piston marked 20 over?

most likely, the carb needs to be jetted, main jet is too rich what number is in it?