Recent content by JB Boozer

  1. J

    Videos - Flathead Bogging Down - Briggs 5hp

    someone else was saying 60psi may be ok with the ez-start compression release built into the cam...but idk, seems low to me too Checked flywheel timing key today, looks straight on. Guess it's time to crack open - hopefully more interesting things going on in there
  2. J

    Videos - Flathead Bogging Down - Briggs 5hp

    Update, did the compression test, came back with 60psi...i did try putting some oil into the cylinder and trying again, same ~60psi...someone saying possibly a stuck piston ring. also, another person has indicated he feels my timing may be off, based on my photo of flywheel at TDC...says...
  3. J

    Videos - Flathead Bogging Down - Briggs 5hp

    So I have to say, there seems to be alot of popping going on during the video I posted....any ideas on what that could be?
  4. J

    Videos - Flathead Bogging Down - Briggs 5hp

    yeah, i still need to check the compression with a gauge. I did find one trick, read that if you spin the flywheel backwards and it springs back forwards, then compression is likely not the issue...so that's all I've tried and it did bounce back very well...idk how effective that test is...
  5. J

    Videos - Flathead Bogging Down - Briggs 5hp

    update - I replaced the diaphragm over the holidays, and still did not help. also, just to revisit on the gearing Clutch 14t; sprocket 59t, tires 11.5" I did try a new clutch with 12t, and same thing happened. Also the folks at Atlanta Motorsports Park have recommended a 17t-19t clutch with...
  6. J

    Videos - Flathead Bogging Down - Briggs 5hp

    KartFab - yeah they're pretty cool and simple - i'm glad I pulled this thing back out to piddle around with. I'd like to get it in good enough shape to take racing at Atlanta Motorsports Part - about 20 mins from me. They said I can mix in with the LO206 guys so I figure to possibly put in a...
  7. J

    Videos - Flathead Bogging Down - Briggs 5hp

    Sorry, rear is 59, Tires are 11.5x 6.00-6 Dunlop RH7 Clutch is noram ge Like I said, it's set up for wka sprint, put up wet too many years ago. ..gearing isn't the issue, ran fine back in the day Barnesville GA...so to be clear, it's not a yard kart, it's a sprint kart, originally setup by a...
  8. J

    Videos - Flathead Bogging Down - Briggs 5hp

    14 sprocket clutch, 56 rear. ..wka sprint racing kart from back then, gearing is fine..New clutch does the same thing...and yes its smoking the clutch
  9. J

    Videos - Flathead Bogging Down - Briggs 5hp

    Photos and Video: https://onedrive.live.com/redir?resid=EF997A0CE0CD14D9!2505&authkey=!AAhWUVtzX99_d1U&ithint=album%2c This is a Briggs 5hp Flathead (RaptorIII) from '99, i raced it about half the season and it's been inside dry storage ever since...it ran fine when I put it up…so about 15hrs...
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