Backfire xtz 660 '92
I've just completed a overhaul of my xtz 660 ' 92. The bike was running fine but using a lot of oil.
I changed the valves, valve guides, timing chain and piston rings.
I put everything back together and she started first time, tick over is ok, accelleration ok, but a slight backfire when I change down gear or ease off the throttle.
I've checked the valve timing and tappets again, but problem persists.
Any ideas?
Davy
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