Yoshimura cam markings

[Guest]

Where would Yoshimura cams for an 83 Gs1100 be marked if at all ? This motor I have has a ported head stamped Yoshimura and Im not sure if it has the cams too. The exhaust cam does have a tach gear on it but it has an electronic tach on it

[niclpnut]

Adjustable sprockets?

Might have part # under sprocket on the flat face under the sprocket.

Nic

[ozman]

from memory they would have "POPY" cast on the cams
i know the 8 valve cams did not 100% sure on the 1100

ozman

[Katarat]

Ill take another look tomorrow. Cam sprockets don't appear to have elongated holes in them. Did Suzuki continue to use cams with the tach drive gear on electronic tach motors ? Intake cams have pits on several of the lobes also.

[posplayr]

Ill take another look tomorrow. Cam sprockets don't appear to have elongated holes in them. Did Suzuki continue to use cams with the tach drive gear on electronic tach motors ? Intake cams have pits on several of the lobes also.

All of the 83 1100esd (electronic tach)cams were same as ed with exhaust ca m gear. On 1150 they mostly all have no gear , but Iirc ray said some 1150 still had a gear despite the electro tach.

I was going to say measure the lobes but then we will have to debate the rocker ratio.

[Katarat]

Im just curious anyway, its not that important, they will stay in there anyway. Theres some pitting on some lobes that look like they came that way, I don't see any sign of galling from it. If I an get a micrometer or some calipers in there Ill see what the lobes measure. Ive got to get one of those rocker arm adjusting tools also

[silverbullet132]

Yeah take measurements on the cams and compare to the listings on the yosh website. That is the easiest way to do it, aside from finding the POPY markings.

[Katarat]

I came up with a lobe measurement of 1.372 or 34.85 mm with my cheapo dial calipers. The intake cam has R1 & 455 marked on it. The exhaust cam has R2 & nothing else on. I set them all at .005, they had maybe .002 at the most. I just ground a notch in an old short screw driver and turned the square adjuster with it

[niclpnut]

I came up with a lobe measurement of 1.372 or 34.85 mm with my cheapo dial calipers. The intake cam has R1 & 455 marked on it. The exhaust cam has R2 & nothing else on. I set them all at .005, they had maybe .002 at the most. I just ground a notch in an old short screw driver and turned the square adjuster with it

stock cam.

sprocket face should be marked with 470.

Nic