rpms

Well I've build a another flat track bike out of the infamous super Powell . I've taken off the Powell frame rails and foot plates . And I've gone with single down tube and still have the kart style motor mount . The foot rest are a one piece design that clamps on just like the motor mount does...

Hey everyone. I recently raced a buddy on my modified briggs 5 hp flathead, and have been kind of bummed that the engine doesnt break 3800 rpms on a flat surface. Here is some background (before you ask 'did you remove the governor?') :thumbsup: Briggs5 hp flathead with steel sleeve i built...

Hi all, My son and I recently built an Asuza Minibike using a predator 212 engine. We've modified the engine a fair bit and have had good success (so far) with a GTC Torque converter (we know we are exceeding specs with the modified engine) We have the standard 72 tooth rear sprocket, and...

I've been checking out connecting rods for my engine and I came across thishttp://www.OldMiniBikes.com/?target=product&product_id=32297 it says its a performance cast rod from arc. Has anyone used thisk? are they worth anything? How many rpms will it hold up too? They are a whole lot easier on...

ill be honest, was practicing wheelies and had a good one going but didnt end so hot. took a little spill. it hasnt run right since. ripped the carb out not one single sign of damage. running stock airbox upgraded exhaust, gov removed. when i go to start it will start up fine and idle but taking...

I'm going to start this now so I can let others follow and so I can look back at where I started. Stock 212 predator, with zip tie for couple more rpms 60t rear, 17t front, 4.10/3.50-5 tires. Top speed 49mph

I have the 212cc predator clone and recently installed the OldMiniBikes stage 4 hemi on my DB30, the kit doesn't come with upgraded valve springs. It has the mod 2 cam and I can't find any 22 lb springs to turn 7,000 rpms. It is floating the stock valves. Can someone point me in the right direction on...

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?

I'm running a Predator bone stock for now and I am wondering if anyone has found a way to adjust the governor to allow just a little more RPMs. Any ideas?

Is the 4 hp bigger in size is the cam the same size as a 3.5 is the bore also the same size? Pls lmk Ty. Also anyone know the lift of a zoomer cam zx-7 and rpms?

If I remove my governor would I rev higher I currently have a comet 30 series with the 7" rear pulley a 9 tooth drive sprocket and a 60 tooth axle sprocket and I have 16in tall rear tires I can burn the tires and get up to about 30-35mph but I want to go faster so would removing the governor...

Okay, so I got my swap kit from OldMiniBikes warehouse, and I'm gonna go pick up a predator from the local HF. It'll be a hemi model. I'm not gonna go wild with this one yet. I have a header, breather kit, and I'm gonna run a carb that I had on my clone that is on my race cart. mostly stock carb, but...

Have h30 with low low rpm rev limit set now. The link from the gov arm and the carb. Is set on the top notch. How is the best way to raise the RPMs. Bet I'm under 2500 limit right now.

I put a GC160 in a new go kart for my grandkids, and the max speed is a little too high for my taste. I suppose I could limit the throttle adjustment, but that would also restrict the power at slow speed. Is it practical to adjust the governor to limit the the max RPMs to a lower value? If...

ok,i installed my gx200 today with the following mods and it wont rev past 3900rpms :billet flywheel,.010 rod,ss valves.molly pushrods,26lb springs,mikuni 22mmcarb,140 main,17.5 piolt, mikuni fuel pump,super x dyno cam,15cc clone head mild porting,8 deg timing key, (all valve train stock size) i...

Doodlebug with stock 2.5 is shaking pretty pretty hard during takeoff and midrange. When I take off on bike it shakes pretty hard until 15 mph then it smooths out. Seem a bit more than just regular mini bike vibration. Haven't played with anything except the long govener screw

6.5hp 18lb springs, 1.2rocker arms, 265cam, pz22 carb, 18cc head, billet rod and flywheel....how can i make more power my gearing is 12/30 tire is 12in but it seems like i only have a good take off and no long run:no:. what are other things i can add to this setup to raise the rpms...

Blue clone Gov removed 18lb valve springs custom header I made 90 jet Air filter Just wanting to know whatt it will turn so I can put it in the gear calculater. Thanks