Recent content by Oldguy1951

  1. O

    FNR Gearbox fab/weld/install

    Ok, I was asked how my F/N/R Gearbox was holding up behind a Stage1 420. Ran it hard all summer long with no problems! There is a mod I do to the 40 series driven that is one of the keys to my success. The shaft coming out of the gearbox is approximately .795 in diameter before it is stepped...
  2. O

    Rear axle sprocket placement

    Yes, that picture is very helpful, thanks!
  3. O

    Rear axle sprocket placement

    Thanks, Sid! I did find this kind, but all it's going to do is bend the axle on a hard hit. Guess I will fab/weld a skid plate attached to the swingarm to cover the sprocket/brake rotor!😎
  4. O

    Rear axle sprocket placement

    Thanks Sid! What is your opinion on protecting the sprocket by placing it near the tire (I will modify the jackshaft so the engine stays centered)?
  5. O

    Rear axle sprocket placement

    Yes, definitely agree with you! The place We ride has creek crossings with lots of large rocks in the way and I am always concerned about hitting and bending the sprocket/axle. I thought about making a skid plate, but think I would get hung up on it a lot. My idea was to move the sprocket next...
  6. O

    Rear axle sprocket placement

    Why is the rear axle sprocket usually placed on or near the middle of the rear axle where it can be hit by every rock/stump on the trail? I am going to move mine right by the left side rear tire (25x12-9 Mudlite XL) where it will be almost impossible to get hit. Is the any reason why I should...
  7. O

    Go-kart sprocket help

    I think a lot of belt life is due to good driving skills which you obviously have!👍
  8. O

    Go-kart sprocket help

    Maybe I'm luckier than most, my hour meter says I have 28.3 hours on the same belt (and my Grandson and I don't baby it)!😅 A torque converter and 70/80 tooth sprocket and he will be ready to rip!😎
  9. O

    Go-kart sprocket help

    Not going to argue with you Sid! Definitely needs torque converter. I can park my front tires on the bottom of that hill, punch it and spin those big mud tires all the way up (engine is only stage1)
  10. O

    Go-kart sprocket help

    Heavy buggy, 212 Predator, 30 series torque converter, 22" tires, 7 to 1 gearing. Will climb 30° grades with ease!😎 30° hill coming up!😬
  11. O

    Go-kart sprocket help

    This #4170 tooth sprocket will work fine with #420 chain (I am currently using the same sprocket and chain). You will need a SK hub for 1" shaft (the SK hubs are far superior to the hubs on standard kart sprockets. Or just get a #35 clutch (won't be near a strong as #420)!😬
  12. O

    Go-kart sprocket help

    With 20" tall tires, absolutely! Even with 10" tires I wouldn't go less than 40 teeth (and even that would be hard on the clutch)! Gear it lower and it will run great and the clutch will last. 😎
  13. O

    Go-kart sprocket help

    Offroad 80 teeth, grass/yard 70 teeth, pavement only 60 teeth.
  14. O

    FNR Gearbox fab/weld/install

    Thanks but no. I hate being down waiting for parts so I keep a spare of everything in stock (drives my wife nuts)!😎
  15. O

    FNR Gearbox fab/weld/install

    I have also considered an ATV engine with reverse, but most of them have shaft drive and I don't want to go that route. The FNR gearbox is holding up well so I am going to stick with it for now (I do have a complete spare that I can throw on in less than an hour if need be).
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