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Hello.
I've been trying to save this bike for a few weeks now and your help is greatly appreciated.
Torn off the head when it was clear the valves were bent, and glad I did. They were down-right curly.
New cam chain, tensioner, roller and arm (the old ones were trashed) and good, refurbed valves.
In the process of rebuild I lost TDC, so before I buttoned it up I reset the piston at the top, making sure it was set to 'LT' on the compression stroke, lined up with the cam gear and the cam pin at 12 o'clock. However, something still isn't right as I can only get 60psi on either cylinder.
1 - It appears to me that when setting TDC, the cam pin should be at the 6 o'clock position at TDC and not the 12 o'clock position as is stated in the literature. At 6 o'clock the lobes for the left cylinder are down (valves closed) as the piston hits TDC. Is that correct?
2 - Also, when rolling the engine, the compression stroke never lines up with the cam gear / cam pin. If I do it by the book, I only get the compression stroke when the cam pin is at 6 o'clock. Is that correct?
In the photo, you see the cam pin at almost 12 o'clock and the lobes are up.
Thanks in advance.
I've been trying to save this bike for a few weeks now and your help is greatly appreciated.
Torn off the head when it was clear the valves were bent, and glad I did. They were down-right curly.
New cam chain, tensioner, roller and arm (the old ones were trashed) and good, refurbed valves.
In the process of rebuild I lost TDC, so before I buttoned it up I reset the piston at the top, making sure it was set to 'LT' on the compression stroke, lined up with the cam gear and the cam pin at 12 o'clock. However, something still isn't right as I can only get 60psi on either cylinder.
1 - It appears to me that when setting TDC, the cam pin should be at the 6 o'clock position at TDC and not the 12 o'clock position as is stated in the literature. At 6 o'clock the lobes for the left cylinder are down (valves closed) as the piston hits TDC. Is that correct?
2 - Also, when rolling the engine, the compression stroke never lines up with the cam gear / cam pin. If I do it by the book, I only get the compression stroke when the cam pin is at 6 o'clock. Is that correct?
In the photo, you see the cam pin at almost 12 o'clock and the lobes are up.
Thanks in advance.
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