Aussiecrf230 wrote:Does it have a metal sump guard or original plastic? The noise reflection of the metal one can make you think it is going to explode.
Fix the exhaust leak or you will be chasing your tail with noises as well as state of health of engine.
The hose may be causing an issue due to the volume it contains.
If you wind the motor over does it get higher.
Are you doing it with throttle fully open.
If still low, put a spoonful of oil down the spark plug hole whirl it over for 10 seconds with no plug or tester in and take another compression reading. Post what you get.
Compression shouldn't be a problem unless the air cleaner is doing its job.
Aussiecrf230 wrote:Yes I did mean if aircleaner wasn't doing its job. Late nights.
Does seem strange - possible broken valve spring??
The valves seem to stay put for ever so be surprised if the gaps are wide.
Check the timing chain before you pull it apart anyway as it sounds a bit like a loose chain (but recorded sounds are difficult to diagnose).
Aussiecrf230 wrote:I would turn motor over by hand until both the inlet and exhaust rockers have clearance and see what timing marks do line up.
It is only 0.004 inch so easy to miss.
Try a bit either side of either TDC if the chain has slipped that could be the issue.
What manual do you have? It should show tensioner set up.
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