Fun Quiz: Are the cams one tooth out?

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KitchenSync · #1 Post by **KitchenSync** » Mon Apr 13, 2015 4:18 pm

Just checking I've got the cam timing right before I get back on the road.

flashback: This was my pristene, low mileage RSV engine from Belfast that turned out to have replacement heads and the rear timing was 360° out (amazing that he rode the bike before breaking it - you'd think you'd notice that you were riding a 495cc compressor)

By the by - I worked it out and got it running. But this is eating me - I know the marks don't line up exactly but this looks like I might be a tooth out! The engine has run like this without any hot valve on piston action but I think that's possible.

Here's a link to a piccy from 5 mins ago - with the rear locked at TDC.

https://docs.google.com/file/d/1dN9sEoo ... cslist_api

Wotchafink??

spiderwheels · #2 Post by **spiderwheels** » Mon Apr 13, 2015 7:17 pm

Looks a tooth out to me too. AFAIK, IN should be horizontal across

D-Rider · #3 Post by **D-Rider** » Mon Apr 13, 2015 8:59 pm

Just the one tooth out ?

KitchenSync · #4 Post by **KitchenSync** » Tue Apr 14, 2015 2:13 am

That's a Shane. This is the last place I expected people to Pogue fun at me.

Wally · #5 Post by **Wally** » Tue Apr 14, 2015 10:18 am

KitchenSync wrote:That's a Shane. This is the last place I expected people to Pogue fun at me.

Nice one!

KitchenSync · #6 Post by **KitchenSync** » Wed Apr 15, 2015 1:54 pm

So with all the Gubbins off it looks fine after all

https://docs.google.com/file/d/0B168K7M ... cslist_api

Exhaust level - inlet slightly up

How hard would it have been to make it perfectly level I wonder?

D-Rider · #7 Post by **D-Rider** » Wed Apr 15, 2015 2:07 pm

I seem to remember some pictures somewhere of slotted sprockets to be able to adjust the valve timing.

spiderwheels · #8 Post by **spiderwheels** » Wed Apr 15, 2015 4:00 pm

Must have been the angle on the last photo as it appeared to be angled up by a full tooth on the inlet side when you had it at TDC

KitchenSync · #9 Post by **KitchenSync** » Wed Apr 15, 2015 9:37 pm

Actually you were right! I put the balancer gears back on and span the engine a few times and it looked out again. So I locked it in place with the proper bodged length of m8, took the gears off and it was definitely off a tooth. Fixed it, gears on and it's all good after rotating a few times with no crunchy valve on piston noises.

Getting very close to needing some fresh fuel to boot this thing up!