Universal Leak Down Tester (08-0071) by Motion Pro. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials using up-to-date equipment, it ensures everlasting reliability and enduring value. This product is distinguished by total quality assurance, unsurpassed by anybody else.
Customer Review's
Leak tester
This tester is a great tool for any mechanic that is
serious about performance finding leaks is simple and effective
especially in snowmobiles we have found that the exhaust is always
suspect to leaks and should always be addressed. It does not fit
everything out there but gives you enough to test 90+% of what is out
there. Just as a side note dont lend it to friends I am still looking
for the one that I worked for and someone borrowed!! A+++ product and
would strongly recommend it. I'm saving to buy another one.:)
by Jeremy I bought this leak down tester in '98 for my TZ 250. I've been using it ever since. It works and lasts. When testing a 2 stroke engine for air leaks I want the engine to hold 7 psi. Ed Sorbo EDventure Racing
Features:
- Designed to check for air leaks in 2-stroke engines
- Includes air pressure gauge, pump-up bulb and fittings and adapters for most single and twin cylinder 2-stroke motorcycle engines
- Packed in a convenient carry box, complete with instructions
- Made in the USA
- Precisely engineered to ensure ultimate efficiency
- Manufactured using innovative technologies
- Absolute quality, great durability, and solid workmanship
- Type: 2-Stroke
2 Stroke Leak Down Tester, 08-0071
Pressure testing is a test performed on a two-stroke engine to ensure that the engine has no air leaks. An air leak in a two-stroke engine can cause a lean condition in engine fuel-air mixture. This in turn can result in engine overheating, piston seizure, detonation etc.
WARNING!
Wear eye protection to prevent eye injury from escaping gas and/or flying particles. We recommend that a qualified mechanic in a properly equipped shop perform this procedure.
1. To leak test the engine: cylinder, head, reed cage, intake manifold and spark plug must all be installed and torque correctly. Exhaust pipe and carburetor must be removed.
2. Seal round exhaust ports with the correct size rubber expansion plug. For 1986 - 1991 Honda CR250R and 1985 - 2001 Honda CR500R, remove the exhaust manifold and seal the exhaust port using one of the flat metal plates with a rubber gasket. Optional plate 08-071O is available separately for 1987 - 1989 CR125R. The black vinyl cap and #32 hose clamp are used to seal the oval exhaust port on 1993 - 1994 and 1999 - 2014 YZ250.
3. Insert the correct size carburetor adapter (#1, #2 or #3) into the intake manifold and tighten the manifold clamp. Teflon tape the thread on the quick coupler and install coupler into the carburetor adapter.
4. Push the nylon hose (from the pump/ gauge assembly) into the quick coupler. If the nylon hose leaks where installed into the coupler, push the hose into the coupler assembly while under pressure. It is important to have the system under pressure while attempting to seat the hose to coupler. To remove hose, push green (or gray) ring on quick coupler towards brass fitting while pulling and twisting hose out.
5. With all test equipment in place and the piston at bottom dead center, use the hand pump to pump 6 PSI of air pressure into engine. Never exceed 8 PSI of air pressure or damage to the seals and/or engine may occur. If loss of air pressure occurs, spray soapy water over mating surfaces to see where soap bubbles appear. Repair any leaks that may appear and redo test. A leakage rate of 1 PSI per minute is acceptable; however the lower the leakage rate the better your engine will perform.
6. By carefully listening at various points, you may be able to locate air leaks that are not easily accessible with soapy water. Crankcase seal leakage may be heard by removing the magneto cover or if on primary side may be heard through the oil filler hole. Leakage at the power valve seals and O-rings can be heard by removing the power valve linkage covers or through the transmission oil filler hole. On water-cooled engines, head gasket leakage may show up as bubbles in the radiator coolant.
7. On the Yamaha Banshee, RD 350/400, RZ350 and TZ250 (parallel twins) the center crank seal (labyrinth seal) will allow low velocity air to pass from one side to the other side. Therefore, both the left and right cylinders/ crankcases are tested together. To do so, seal both exhaust ports and one intake port. Then, install the correct carburetor adaptor into the remaining intake port. Perform steps 1 thru 6. There is no way to check the labyrinth seal; this seal will normally out last the crankshaft main bearings. On Suzuki RM motorcycles, the power valve breather hoses must be plugged off in order to pressure test the engine correctly. There is no seal in the power valve chamber.
8. Each leak down tester is tested for leaks at Motion Pro. To insure that your leak down tester remains leak- proof it should be tested periodically. To test simply connect leak down tester hose to a 1 quart leak proof container and pressurize to 6 PSI. If no leakage occurs in ten minutes the tester is leak proof. To locate leaks spray a soapy water solution over fittings and connections and look for soap bubbles. On pipe fittings, use Teflon tape or pipe sealant. Occasionally, the check valve between the hand pump and hose will leak. Clean the check valve with contact cleaner and re-grease the ball in the check valve to insure a good seal, and then retest.
Pressure testing is a test performed on a two-stroke engine to ensure that the engine has no air leaks. An air leak in a two-stroke engine can cause a lean condition in engine fuel-air mixture. This in turn can result in engine overheating, piston seizure, detonation etc.
WARNING!
Wear eye protection to prevent eye injury from escaping gas and/or flying particles. We recommend that a qualified mechanic in a properly equipped shop perform this procedure.
1. To leak test the engine: cylinder, head, reed cage, intake manifold and spark plug must all be installed and torque correctly. Exhaust pipe and carburetor must be removed.
2. Seal round exhaust ports with the correct size rubber expansion plug. For 1986 - 1991 Honda CR250R and 1985 - 2001 Honda CR500R, remove the exhaust manifold and seal the exhaust port using one of the flat metal plates with a rubber gasket. Optional plate 08-071O is available separately for 1987 - 1989 CR125R. The black vinyl cap and #32 hose clamp are used to seal the oval exhaust port on 1993 - 1994 and 1999 - 2014 YZ250.
3. Insert the correct size carburetor adapter (#1, #2 or #3) into the intake manifold and tighten the manifold clamp. Teflon tape the thread on the quick coupler and install coupler into the carburetor adapter.
4. Push the nylon hose (from the pump/ gauge assembly) into the quick coupler. If the nylon hose leaks where installed into the coupler, push the hose into the coupler assembly while under pressure. It is important to have the system under pressure while attempting to seat the hose to coupler. To remove hose, push green (or gray) ring on quick coupler towards brass fitting while pulling and twisting hose out.
5. With all test equipment in place and the piston at bottom dead center, use the hand pump to pump 6 PSI of air pressure into engine. Never exceed 8 PSI of air pressure or damage to the seals and/or engine may occur. If loss of air pressure occurs, spray soapy water over mating surfaces to see where soap bubbles appear. Repair any leaks that may appear and redo test. A leakage rate of 1 PSI per minute is acceptable; however the lower the leakage rate the better your engine will perform.
6. By carefully listening at various points, you may be able to locate air leaks that are not easily accessible with soapy water. Crankcase seal leakage may be heard by removing the magneto cover or if on primary side may be heard through the oil filler hole. Leakage at the power valve seals and O-rings can be heard by removing the power valve linkage covers or through the transmission oil filler hole. On water-cooled engines, head gasket leakage may show up as bubbles in the radiator coolant.
7. On the Yamaha Banshee, RD 350/400, RZ350 and TZ250 (parallel twins) the center crank seal (labyrinth seal) will allow low velocity air to pass from one side to the other side. Therefore, both the left and right cylinders/ crankcases are tested together. To do so, seal both exhaust ports and one intake port. Then, install the correct carburetor adaptor into the remaining intake port. Perform steps 1 thru 6. There is no way to check the labyrinth seal; this seal will normally out last the crankshaft main bearings. On Suzuki RM motorcycles, the power valve breather hoses must be plugged off in order to pressure test the engine correctly. There is no seal in the power valve chamber.
8. Each leak down tester is tested for leaks at Motion Pro. To insure that your leak down tester remains leak- proof it should be tested periodically. To test simply connect leak down tester hose to a 1 quart leak proof container and pressurize to 6 PSI. If no leakage occurs in ten minutes the tester is leak proof. To locate leaks spray a soapy water solution over fittings and connections and look for soap bubbles. On pipe fittings, use Teflon tape or pipe sealant. Occasionally, the check valve between the hand pump and hose will leak. Clean the check valve with contact cleaner and re-grease the ball in the check valve to insure a good seal, and then retest.
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