srx cam chain sprocket timing marks alignment query

[Steve Lake]

SteveH is quite correct, there is a dot on the camchain drive sprocket which should align with the key slot.
However, I do have a 'workround' (as microsoft term repairs to their hopeless operating systems)
a cam sprocket with slotted holes (rather than the usual round ones), I bought this when i was playing around with different cams and timing, and allows shifting of the cam in relation to the crankshaft, you could use this to take out the mis-alignment, far less hassle than splitting the engine and taking the crankshaft to an engineer who can do the 'sweat off/on' job.

it is relatively new, only used on an engine i used for track days, you are welcome to try it, if it does the job i'm sure we can come to an amicable arrangement.
cheers

[guest668]

thanks steve will let you know if i need it

[guest668]

have got rotor off !!!!!!!!! air gun and mini puller did the job thanks for all the advice everyone. The chain is looking a bit stretched the crankshaft sprocket looks fine...will it be ok to just replace the chain and maybe top sprocket rather than all sprockets anyone done this i cant see how that bottom sprocket could be replaced without mega hassle. Interestingly the dot that lines up with woodruff key isnt perfectly centred on mine either and im sure this engine has never been tampered with before. 

[guest668]

steve thanks for offer of the slotted cam sent you message but havent recieved reply yet think it would be a good option would it be possible to send via post? whereabouts did you get hold of it ?

[Steve Lake]

Yeah... big probs with my email at the mo... all 3 accounts seem to be playing up.... the most reliable one is ..  pightlefarm@lineone.net

i got the sprocket from the guy in the states who does thumper stuff... he's listed on here somewhere (or maybe it was on steveH's site)

[themoudie]

Aye beezer,

This maybe the site SteveL refers to: THUMPER_STUFF

However, I've had a looksee and can't see a slotted sprocket at present. Drop him a line, just in case.

I hope this helps, Bill.

[Steve Lake]

you're right Bill, no sign of it.... worth dropping him a line though.
another thing worth remembering if you order any piston/barrel/gasket components is that their (usa) 'standard' srx600 bore size is different to the european 'standard', european (and home market) srx600 are 607cc and the usa is 595cc..
cheers

[guest668]

well we hecked the timing again today with a tdc tool and timing mark on sproket at top are 1mm outwhen all set up...is it worth worrying about will it make that much difference. I suppose while engine is out and alternator off might aswell replace the chain and maybe top sprocket but dont think i will bother with bottom one it sounds like way too much bother ...thing is tension on chain is good sprockets look ok it just seemes to have stretched a bit.

[Steve Lake]

well, a good test is to use the valve opening angle, with a 'degree' disk on the crankshaft make sure the valves open at the correct point (valve opening data is in the workshop manual)... if the valves open correctly (with the gaps set up properly, i use 3 thou inlet, 6 thou exhaust) then you don't have a problem.

[guest668]

thanks steve will check that out

[guest668]

just a thought on the valve opening angle option will the valve opening data in the srx600 manual be right for the srx400 are the cam shafts the same etc...if not does anyone know the aprropriate data i need ...again many thanks

[themoudie]

Aye beezer,

This should be the site of reference for the SRX400! SRX400_Tech_Info

However, at present they are exceeding their permitted bandwidth and consequently, you can't view a thing! I am not sure how to deal with this, but SteveH or SteveL may do.

All the best with the continuing assembly.

My regards, Bill.

[Steve H]

The only thing I can think to do is
1 - Fit the original cam chain sprocket
2 - Measure the valve timing when the cam chain sprocket marks are aligned with the head gasket face.
3 - Fit the adjustable sprocket
4 - When the crank is timed in correctly check the valve timing
5 - Adjust the timing to suit and repeat ad infinitum

If it was me I would just fit and forget that the timing is slightly out.

[themoudie]

The only thing I can think to do is
1 - Fit the original cam chain sprocket
2 - Measure the valve timing when the cam chain sprocket marks are aligned with the head gasket face.
3 - Fit the adjustable sprocket
4 - When the crank is timed in correctly check the valve timing
5 - Adjust the timing to suit and repeat ad infinitum

If it was me I would just fit and forget that the timing is slightly out.

I agree with the final sentence.  Bill.

[Steve Lake]

me too