Recent content by subydrift

  1. subydrift

    Tomberlin Crossfire 150 Rebuild

    The rear shocks I got off amazon, link is below. For front shocks I used some takeoffs from a Skidoo Summit 800 that I found locally. They are 17" eye to eye so I cut off the stock lower shock mount and welded on some new taller units to keep the front end geometry the same. The springs feel...
  2. subydrift

    Tomberlin Crossfire 150r parts needed

    Unfortunately mine is just a 150, not a 150R so no reverse on mine. If you can't find the parts you need maybe pull the assembly off and look at an aftermarket setup from BDX Performance?
  3. subydrift

    Tomberlin Crossfire 150 Rebuild

    Kart has been running strong for the summer. I had a little issue with getting it idling after sitting for a few weeks but I took the carb apart and swapped in the old main jet and cleaned it out and it idles and runs better than before. The suspension on this thing is butter smooth! The front...
  4. subydrift

    GY6 Not running after sitting for 4-5 weeks

    I took the carb apart last night and found out I need a better air filter. Lol. There was some small gunk in the main jet needle area so I cleaned it all out and swapped the main jet from the old carb into the new carb and she runs way better than before. I think I was running super rich before...
  5. subydrift

    GY6 Not running after sitting for 4-5 weeks

    I think I'm gonna pull the valve cover and check the valve lash. Sounds like that is a common symptom for if the valves come out of spec.
  6. subydrift

    GY6 Not running after sitting for 4-5 weeks

    Hey guys, I rebuilt the GY6 in my son's Crossfire and it was a great runner for probably 2 months. Started right up, idled strong, never any sputtering or dying issues. Well it's sat in the garage for probably 4-5 weeks and now it will not stay idling. It will turn over for a couple seconds but...
  7. subydrift

    Tomberlin Crossfire 150 Rebuild

    I did a little reading online after googling this issue with the gy6's and one thing sparked in my head. While I was trailering the buggy to our property (roughly 1-1/2 hour drive) I remember I did not shut off the fuel pet cock. I kept thinking I should jump out at a red light and close it but...
  8. subydrift

    Tomberlin Crossfire 150 Rebuild

    I also ordered a new valve cover to make sure the head vent is clear. I noticed there was some silicone or something globbed in and around the inside and around the outside of the nipple on the original. I don't know if it is causing blockage or whatever but I figure a new one is cheap...
  9. subydrift

    Tomberlin Crossfire 150 Rebuild

    Thanks Denny. I’m going to change the oil again and pull the carb off and test the float seal to see if I can hear or see it leaking. It seems odd that fuel would be draining into the cylinder with a brand new carb, from a reputable dealer none the less. I wonder if maybe the rings got jostled...
  10. subydrift

    Post your finished projects!!!

    G.W. I haven't kept track of the costs dollar for dollar but I'd say including the cost of the cart somewhere around $1,700-$1,800? There were a few processes I could have saved money on had I known what I know now. Lol.
  11. subydrift

    Post your finished projects!!!

    Here is my 9 year old's finished Crossfire 150. Started it in December 2022 and just finished it the other day. Full tear down and rebuild of frame, motor, suspension, etc.
  12. subydrift

    Tomberlin Crossfire 150 Rebuild

    No oil cooler on this model. Is there an easy way to check the carb float valve? The carburetor is a new unit with performance jets from Go Powersports. It has an idle air fuel mixture screw maybe it is running rich? I'm going to check the spark plug today also and maybe open the gap a little...
  13. subydrift

    Tomberlin Crossfire 150 Rebuild

    Well we had a successful first trip out with the buggy! It fired right up and sounds great. The kids had a blast. I do think I am going to swap in some 12g rollers to keep the revs a little lower. The kids don't drive it all that fast and to have it revving so high right behind your ear is...
  14. subydrift

    Tomberlin Crossfire 150 Rebuild

    Everything from the main case up was replaced, well, except the cam and timing chain. I added a little copper rtv to the lower cylinder gasket and it got a new cylinder, piston with rings, wrist pin, head gasket, new head with valves, seals, springs, etc. and then a new valve cover gasket too. I...
  15. subydrift

    Tomberlin Crossfire 150 Rebuild

    @Grizzlymi luckily I have the new harness from Super GY6 so all I have to do is figure out where to land all the connections. Hopefully…. Lol I got the engine all gone through tonight and got the new top end all installed, valves adjusted and everything. I’m hoping to get the new stator in...
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