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A carburetor diaphragm seems to be burned and I suspect a back fire from the engine in to the carburetor.
A small valve clearance can justify this behavior.
I suspect that the previous owner has installed a camshaft of another Triumph motorcycle in order to increase the power performance.
I am looking for a criteria for recognizing the Legend camshaft.
I try to explain you a possible way for recognizing which kind of camshaft is installed.
There are 3 version of camshafts for different model of Triumph, with the following timing:
1) IN 211° EX 210° OEM Legend TT camshafts
2) IN 251° EX 256°
3) IN 262° EX 262°
Those timing on the camshafts have to be divided by 2 (1 camshaft turn = 2 crankshaft turns):
1) IN 105° EX 105° OEM Legend TT
2) IN 125° EX 128°
3) IN 131° EX 131°
The camshaft sprocket has 38 teeth, if I want to convert the timing in number of camshaft sprocket teeth:
1) IN 11 EX 11 OEM Legend TT
2) IN 13 EX 13.5
3) IN 14 EX 14
If the valve are still open for more than 11 teeth then the camshaft is not the Legend TT camshaft.
Is it correct ?
Are there some other criteria for recognizing the OEM camshaft ?
I appreciate very much your help.
Thank You.
Last edited by polex : 04-25-2008 at 09:40 PM.
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