An expert who has achieved level 3 by getting 1000 points
An expert that got 10 achievements.
An expert that got 5 achievements.
An expert whose answer got voted for 500 times.
Re: leaking compression on my VR
Check the valve clearance to see if one of the valves is tight To figure out whether it's the rings or the valves try this. Lock the crank with a wrench with the piston at TDC (Top-Dead-Center) and run some compressed air in through the spark plug hole. Make sure you have a good hold on the crankshaft wrench or the engine will spin throwing the wrench off ! Now listen. If you hear air coming out at the carb or air cleaner the intake valve is leaking. If at the exhaust pipe, it's the exhaust valve. If at the engine breather, it's the rings.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
How did you check the valves? Something is leaking bad if no compression. Do you have hole in the piston? Or the Rings have failed? If you squirt a good amount of Oil into the cylinder then check compression what happens. if you get a little compression, I'd say the oil is enough to improve compression and you may be right the valves are ok. If again no compression, valves are probably leaking. If you have a head gasket, it may be leaking.
Soap solution at joint of head may reveal leaks.
I do not recommend this bike. Honda, Yamaha, Suzuki are good choices. You can find a dealer all over the world. The bike is junk the first time a part fails if you can't get parts and service. Seen any dealers in your city? The bike is made in Taiwan. Here's the info you asked for, even though I advise against it.
Top speed 65 to 70 mph
Overall Height1170 mm (46.1 inches)Overall Width880 mm (34.6 inches)Overall length2110 mm (83.1 inches)Seat height810 mm (31.9 inches)Wheelbase1375 mm (54.1 inches)Fuel capacity - reserve12 l (3.2 gallon US)Dry weight126 kg (277.8 pounds)Enduro-OffroadModelVR 150X
ENGINE Type149 cc, air cooled, single cylinder, 4-strokeStandard compression 145 lbsPower13.5 hp (10.1 kW) @ 8300 rpmBore x stroke (mm)62 mm x 49.5 mmCompression ratio9.6:1Valves2 valves per cylinderIgnitionCDITorque12.4 Nm (9.1 ft. lbs) @ 8300 rpmHow about a top rating on this answer. Thanks!
It's either a defective gasket (wrong shape or inconsistent thickness at seal surface) or poor installation (installed with a wrinkle overtightened etc.).
Clearly it's a problem and not by design. If you're going to design something to leak it's easier to do without a gasket!
Tell the Scuderia boys to fix it right. Should be warranty work, I'd think.
Connect your tester to the big thick spark plug lead and crank the engine. You should see a nice big fat blue spark. If you don't disconnect the engine kill button. If there still is no spark you will need to determine if the engine has points or electronic ignition. Most (but not all !) bikes built before 1980 have points ignition. Most bikes built after 1980 (but not all !) have some sort of electronic ignition system. If in doubt pull one of the crank end covers (Usually 2-3 screws) and look ! If you have a battery and coil points system see the points page If you have a points magneto system see the Magneto page. If you have an electronic ignition system see the electronic ignition page.