i checked the valve gap, okay is there a comp. release or is it carbon holding the valve open,compression is slipping by somehow
2007-04-04 15:14:08 · 9 answers · asked by JERRY L 1 in Cars & Transportation ➔ Motorcycles
I believe it has sat for to long and the rings are temporarily stuck.Put a little WD-40 in the plug hole and let sit for a couple of days.Fire it up and smoke the neighbor hood up and ride it.The problem will probably clear right up.I have done it before.
2007-04-04 17:20:30 · answer #1 · answered by (A) 7 · 0⤊ 0⤋
A table spoon of oil in the cylinder will tell you if the piston rings or cylinder are worn ( check compression right after you put the oil if it goes up they are worn). To check if your valves are OK, take an old spark plug break out the porcelain attach a fitting so you can put compressed air in the cylinder, Put the cylinder you are testing in top dead center in the compression stroke, put the air if you hear air leaking from your exhaust or carb your valves are not sealing properly.
2007-04-04 17:17:57 · answer #2 · answered by Curious George 4 · 0⤊ 0⤋
Could be a number of things. Cracked piston, broken/worn rings, valve burned or bent.
Off comes the head, and have a good look. You don't have a lot in the bike, and that's good. You can probably get a whole usable head on eBay for $40-$50. If you need bottom-end parts, consider looking for a whole used engine.
Good luck. the Virago's an under-rated bike, and does a lot of things well.
2007-04-04 15:23:07 · answer #3 · answered by Yesugi 5 · 0⤊ 0⤋
assuming you have done both a dry and wet compression check.
I am thinking you may be looking into checking the rear cylinder for excessive wear you may need to do a cylinder re-size (rings may not be sealing the cylinder causing compression blow by back into the crank case is it pushing oil out anywhere ?) the rear cylinder on these engines and many like it run hotter than the front cylinder causing faster wear down of parts.
2007-04-04 15:39:32 · answer #4 · answered by dinosaur 4 · 0⤊ 0⤋
For $550 it would be hard to say no to getting a motorcycle. If you can only afford that much then I would say go for it. The Virago is not a bad bike at all so I think you'd be coming out on top. However, if you can afford a bit more, say $2,000 you could get a significantly newer, nicer motorcycle. That Virago is nearly 30 years old and so it's not going to run perfectly but if you could spend a bit more you could probably get a 10-15 year old bike that would be a lot more reliable. If you can't afford, I'd say go for it. You get what you pay for so it's definitely cheap.
2016-05-17 08:19:50 · answer #5 · answered by kristen 3 · 0⤊ 0⤋
If the valves are ok, you may need to look futher and check the rings and cylinder. It may have gotten too hot. The rear cylinder does not get nearly the same airflow as the front, and will run hotter.
2007-04-04 15:22:27 · answer #6 · answered by Firecracker . 7 · 1⤊ 0⤋
a few drops of oil in the rear cylinder & check again...
this helps seal the rings....if its better could be time for a rebore...
& yes it could just be carbon build up holding the valve open..
could also be bent valve , cracked head, blown head gasket,
would be worth fixing though...
2007-04-04 16:32:04 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Now that you have established it has low compression there is no point trying to guess the cause, beg, borrow, or steal (not really) a leakdown tester and find out for sure.
2007-04-04 16:14:17 · answer #8 · answered by Anonymous · 0⤊ 0⤋
the rings may just be stuck, run a little Rislone through it or add a good top oil to the oil and run it for a few miles
2007-04-04 15:22:22 · answer #9 · answered by ClassicMustang 7 · 1⤊ 0⤋