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  1. V

    Max **SAFE** RPM for a stage 2 420

    The camshaft is the brain of the engine. Build the rest of the motor to hold up to the rpm range of the camshaft. I would be more worried about the engine failing from not being assembled right then part failure.
  2. V

    Mega moto 212 hemi predator speed

    There must be something wrong with your minibike. I have a Monster Moto MB212 and it goes 35 mph with me (185lbs) on it. First thing I would look at is the belt. You say it has a stock Predator hemi 212 on it? Did some one change the engine? They came with a Lifan 212 engines.
  3. V

    Crank cover tolerances, Permatext gasket

    Check your crankshaft end play with a dial indicator.
  4. V

    Predator 212 need help plz.

    Goggle compression calculator. There are several online and they take all your dimensions (bore, stroke, piston dome or dish,cylinder head cc, piston deck height. head gasket thickness, and some measurements I'm sure I forgot) and it calculates your compression for you No can come on a forum...
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    Predator 212 Stage 2 build - No Fire (suspect flywheel offset)

    Coil gap? 40 degrees is a lot of timing. You can run the motor without a flywheel key. Get a degree wheel and set the timing to 32 degrees with no flywheel key.
  6. V

    A slippery subject , oil weight

    xn-pure-estorlin-kart-4-stroke-performance-7rb $15.00 a quart isn't too bad and I sure you get that wonderful Klotz smell! LOL
  7. V

    A slippery subject , oil weight

    I believe Klotz also makes a 4 cycle oil for splash lube type small engines. I don't think you'll have a problem with your 0w20 oil but if you looking to get every little extra bit of power out of your engine then one of these racing oils is the way to go. I see the price has really gone up on...
  8. V

    A slippery subject , oil weight

    Back in the early to late 90s I raced 5hp Briggs circle track karts. We used an oil called "Cool Power". I believe it was mineral based oil. We ran ethanol and changed it after every race. I used to save my old oil and would put it in an old 5hp Briggs snowblower that liked to suck oil. That...
  9. V

    Military Mule M274

    I would say 4x4 would be a must! LOL Take a look at this build. watch This uses Subaru drive train and a 420 Predator engine. It is very close to a M274 but it is articulate steering.
  10. V

    Military Mule M274

    Those military "mules" were really cool. I'm surprised more people aren't trying to replicate them. How are you planing on powering all 4 wheels with a hydrostatic garden tractor transaxle?
  11. V

    high-comp 420 piston

    If you plan to add a turbo you might want to keep the compression at 8:1.
  12. V

    The Mule

    Have you ever thought about using a 5 speed transaxle out of a small FWD car (Geo Metro comes to mind). Mount your secondary clutch to the input shaft and side mount the engine. I've seen this done quite a few times and the transaxles are fairly lightweight (I haven't weighed one but have...
  13. V

    The Mule

    I like where your going with this project. What are you going to use for a transmission? Will it be 4 wheel drive? I still can't believe there isn't more people building UTV style machines?
  14. V

    Bandit buggy plans

    222572337316 These plans are about has close to the Bandit buggy has your going to find. I believe these were made by Ted Willard. I have a set called "Northern Buggys Sprint Offroad Buggy" I believe Ted Willard was the one that made the Bandit Buggy plans. Both buggies are very similar.
  15. V

    The Mule

    That must be a nice smooth riding truck! LOL Back when trucks were trucks!
  16. V

    Snowdog/track sled

    There are a lot of variables when it comes to gearing. You need to adjust that clutch to engage quickly and get it locked up before your working rpm range. I'd start with 9-1,10-1 range. Weight, engine size, how you use your machine, conditions, and etc all play into gearing. Just be prepared to...
  17. V

    Snowdog/track sled

    Those clutches can hold up if you understand how they work. You have to have your gearing right so the clutch slips just enough to get you going. So when your cruising or in the range where you use it the most the clutch is locked up.
  18. V

    Snowdog/track sled

    Looking good! I'm still in the pile of parts state! LOL
  19. V

    Milling a 420 head!

    You will never know unless you do the math. I guess my intent of the post is to say there is no magic amount to mill off the head. First off you need a targeted compression ratio. Then you need to see what your actual compression is. Then you can decide what is needed to get to your targeted...
  20. V

    Milling a 420 head!

    It all about compression ratio. You need to cc the head, know the head gasket thickness, measure your piston deck height, measure the bore, and measure the stroke. With this info you use a compression ratio calculator (there are several online) to determine what your current ratio is. Then...
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