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13,451 Posts
Don't junk it.
Go through the bike and check things over to makes and make sure the valves are going up and down when they should when rotating the engine with a ratchet at the inspection cover under the radiator.
90 and 125 isn't that bad either because the test should be done on a hot engine so it should go up higher. My compression is only 100 on both sides and it runs fine.
After you check everything over try to start it again. If for some reason it doesn't start spray a bit of starting fluid in the air box and see if it runs. If so it's the carbs. You can also check the coils.
Go through the bike and check things over to makes and make sure the valves are going up and down when they should when rotating the engine with a ratchet at the inspection cover under the radiator.
90 and 125 isn't that bad either because the test should be done on a hot engine so it should go up higher. My compression is only 100 on both sides and it runs fine.
After you check everything over try to start it again. If for some reason it doesn't start spray a bit of starting fluid in the air box and see if it runs. If so it's the carbs. You can also check the coils.
