rpm

Ok so I've done a lot of research into not only breaking-in Honda clones and Predators but for engines in general. There seems to be a whole heck of a lot of controversy as to what RPM to run the engine during break-in, how long to run it, whether to load the engine or not, etc etc. All in the...

Hi.I have a 22mm Mikuni carb on a 212 predator.My question is how do i tune it to idle at lower rpm?Right now its idleing at 3250 rpm, and my clutch engages at 3000 rpm. So it takes off by itself.

Ok so I am building a HF predator 212cc motor with no govenor, and mostly billet parts. I broke the first cast connecting rod due to over revving. I saw online a Digital hour meter/tach with a "Max RPM Recall"... What is that? Is it a rev limiter killswitch? Or does it tell me im over and is it...

Hi all, I realize this site is dedicated to mini bikes, but it is by far the best resource for modifying Predator engines. I'm a motorcycle mechanic and fabricator and will use a 212 Predator Hemi to build a longtail boat mud motor. It's nice to see how affordable these race parts are...

What does switching the clutch springs on the driven pulley do? The stiffer the springs are the higher the rpm range is. But what is it doing differently? Shifting at higher rpms or engaging the drive pulley at a higher rpm? What's the benefit?

My friend has a math question on a test .... anyone know the formula? Information given: Sprocket = 24 teeth 65 Mph 2000 RPM What will the speed be with a 25 tooth sprocket? Thanks! Kevin

I want a centrifugal clutch that isnt to fat that is somewhat tuneable for rpm engagement. My clone motor is in the 18+hp with typical 3/4 shaft. I tried searching the various sections with no luck, so I figured I would ask before wasting money on something that is poop. what works for a...

This is a new re-imagined version of the rotary engine. The current prototype is rated 3.5 hp at 10,000 RPM and is expected to produce 5 hp revving up to 15,000 RPM when developed. Smaller and quieter the X engine is being produced to replace current piston engines used on such things as...

Just picked up a somewhat new GX160 that was seized. Ended up finding a governor bushing laying inside the crankcase. Pulled that out and freed the piston now she is a great running motor. No damage! Only problem is there is no working governor now. Later on I will be investing in a ARC rod and...

ok i have all these mods on my new predator engine and im only getting 26mph..... ideas? i BYPASSED the govenor. didnt remove it Kn filter NR filter adapter Manifold spacer 90 main jet 140 e tube Header with briggs muffler 10-20-10-50 gearing 19 inch tires

mods so far: 90# main jet, gx140 tube, candy cane header stage 3, k&n dirt air filter w adapter, mods to do: remove governor internally, remove oil sensor internally, install 18lb valve springs, light porting of shortside radius, .016 copper cylinder head gasket, 14cc cylinder head ??? <---...

Has anybody really thought out the pros and cons of low rpm torque monster vice a high rpm screamer? How you set up any engine is a function of torque and horsepower curves, and the ultimate use of that engine. A big block Chevy truck may produce power in the low end of the curve and tow 10K...

As the title says Speedometer, RPM, And Temp Gauge for $100. Its a Vapor Trail Tech. Although I'm not installing it on a a Mini Bike it would work very well for one. It comes with mounts that would allow you to mount it on the handle bar of any minibike with round stock tubing 5/8" to 1". It has...

A buddy of mine has a Baja Doodlebug minibike that he recently put a 6.5 HF motor on. Its a blast to ride but the throttle is really annoying since we just hooked it up to the throttle lever and not the governor arm. It pulls hard but in the top end just kind of hums and cruises not very fast...