Honda TRX-ATC250R / LeakDown Test Kit
Fits Aftermarket Carburetor Sizes 36mm-41mm
ADDITIONALLY, THIS KIT WORKS FOR - SUZUKI RM125 WITH OEM 36mm CARBURETOR
LEAKDOWN KIT IS A GENUINE PROVEN PARTS KIT THAT WORKS!
EASY ORDER PROCESS, TRACKING PROVIDED
*** 10:45 a.m. Eastern Standard Time, cut off for same-day shipping, is still in effect but not guaranteed. I have given myself one business day handling time but usually get orders out same day if rules are followed.
*** Shop with confidence
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Test your engine to see if it will hold 6 psi of air pressure for 6 minutes:
Honda TRX-ATC250R Specific Instructions - Before performing the Leak-Down test, make sure you have the piston at BDC (Bottom Dead Center). Setting your piston to BDC - Remove spark plug. Insert a new pencil (eraser side first) into the spark plug hole until it hits the piston. Turn the motor slowly (using the kick starter) until the pencil is at the lowest point in the bore. You are now at BDC. Remove pencil, replace & tighten the spark plug. Continue Leak-Down test.
Do not add air to the engine using an air compressor since the pressure rises quickly, and you risk blowing your crankshaft seals. Even if your air compressor has a pressure regulator, you are hard-pressed to regulate air pressure under 20 psi.
Using a bicycle hand pump, stop adding air when your gauge reads 6 psi. Optimally, after 6 minutes, the gauge will still read 6 psi.
If the gauge DOES NOT hold 6 psi:
Fill a spray bottle with water. Add five or six pumps of dishwashing soap (For example, Dawn). Gently mix soap with water (Do not shake). Liberally spray your entire engine with the soapy solution. Next, pump 6 psi air pressure into your motor. You are looking for bubbles, thus showing you where your air leaks are (see photos). The slower your engine loses air pressure, the harder it will be to find your air leak or leaks. If you see no visible signs of air leakage, but your gauge continues to lose air pressure, take your clutch cover off and check for leaks around the primary gear and keyway. If there are still no leaks, then pull your stator cover and flywheel to check for leaks. If you still cannot locate any visible signs of air leakage, you will need to replace the crankshaft seals in your motor. Then, perform the Leak-Down test again.
Videos - These are high definition and informative. If using the mobile app? (Cell Phone) Copy the link into your browser.
First Video - LeakDown test procedure on my Yamaha Banshee.
Second Video - Testing Banshee after Leaking it down in a Motel parking lot. I replaced the VFORCE4 intake gasket on the passenger side carb.