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Message started by sparktfxr on 11/09/17 at 17:25:14

Title: Valve timing
Post by sparktfxr on 11/09/17 at 17:25:14

Hi, purchased a 2014 S40 last year which I would like to develop over the next few years..great fun to ride!..& so much information on this forum but can't seem to find the valve timing specs either here in the manual or on the net.. just wondering if you guys can help..Greatfully sparktfxr

Title: Re: Valve timing
Post by Ruttly on 11/09/17 at 19:18:14

Valve timing ? What do you want cam info or how to adjust your vales or valve lash ? How to time your cam ? Be specific !

Title: Re: Valve timing
Post by batman on 11/09/17 at 19:33:14

You probably mean ,valve clearances ,which are the only adjustment you normally can make on the bike, the valve clearances for intake and exhaust valves is .08 to .13mm=.003 to.005 inches .setting the gap to large will make them noisy(but not hurt anything) ,but setting the gap to small will not allow them to close and they could be damaged ( burnt , warped ,or the head of the valve drop of and bounce around the cylinder-all bad).The Clymer's manual tells you to rotate the motor clockwise when bring it to TDC and that is incorrect ,turn the motor the same as the wheels turn ,counter clockwise.(you'll be on the left side of the bike)

Title: Re: Valve timing
Post by verslagen1 on 11/09/17 at 22:02:30

check out the tech section index, link below.

Title: Re: Valve timing
Post by norm92de on 11/10/17 at 07:36:28

The genuine Suzuki manual has a valve timing diagram in it.

Title: Re: Valve timing
Post by sparktfxr on 11/10/17 at 13:13:04

Thanks for the response but I am after the inlet & exhaust valve opening & closing times in degrees, this is quite often displayed as a circular graph in manuals ..mine is a clymer & doesn't have it

Title: Re: Valve timing
Post by SALB on 11/10/17 at 13:21:29

546E6A686953070 wrote:

Thanks for the response but I am after the inlet & exhaust valve opening & closing times in degrees, this is quite often displayed as a circular graph in manuals ..mine is a clymer & doesn't have it

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1338603955/0#0

This is all I've ever seen. Are you having one reground?

Title: Re: Valve timing
Post by verslagen1 on 11/10/17 at 17:44:37

here you go...

Title: Re: Valve timing
Post by norm92de on 11/10/17 at 18:18:40

Good old Versy! ;D

Title: Re: Valve timing
Post by Ruttly on 11/10/17 at 19:40:30

Yup a wealth knowledge & experience !

Title: Re: Valve timing
Post by LANCER on 11/10/17 at 20:54:27

Fortunately for us, Dave and Verslagen and a couple of others here still have fertile minds, unlike a lot of us who suffer from Old Timers disease. :-? ::) :-/ :D

Title: Re: Valve timing
Post by eau de sauvage on 11/10/17 at 21:44:37

282B3E272B247E724A0 wrote:

The Clymer's manual tells you to rotate the motor clockwise when bring it to TDC and that is incorrect

I'm reminded of a story of the Bletchley Park enigma machine code breakers, one of them, I can't remember who would ask others 'what direction do the hands of a clock rotate. The answer is 'anti clockwise', this is correct because it's from the point of view of the clock.

Title: Re: Valve timing
Post by norm92de on 11/11/17 at 10:56:05

I have always been in awe of those people at Bletchley Park. What minds!

Title: Re: Valve timing
Post by sparktfxr on 11/13/17 at 15:28:05

Thanks Verslagen1, thats what I was after..a friend of mine says with that information & some other givens he can work out the best size & length of an exhaust system to work within a particular rev range..so Im interested. Thanks again..Cheers

Title: Re: Valve timing
Post by batman on 11/13/17 at 21:00:56

Your friend may find a few guide lines handy, a header pipe larger than 1 1/2 " is too big and even one that size is only used on motors with increased displacement and after market cam (not stock) header length for a 650 cc bike should fall between 30"to 34" (stock is 32") longer favors lower RPM , shorter favors higher .If his design doesn't fall between these guide lines your bike may run worse, if the header pipe is to large ,speed/and temperture of the exhaust gas slows killing any chance of making hp, and you need a muffler to create back pressure.Our header is double layered which keeps the gases from cooling( slowing down) a single layer pipe would need to be made shorter.The exhaust passage in our head is of bad design ,not like most other bikes, I hope your friend knows his stuff. Many on this sight with stock motors have found that using a H-D Dyna muffler ,carb needle mod/rejet,and less restrictive air filter ,to be the route to a smoother and better running motor( 1-2 more hp) for less than $100 .

Title: Re: Valve timing
Post by sparktfxr on 11/15/17 at 01:09:37

Cheers Batman,thanks for the tips & I have read similar information in your forum before but unfortunately suffer from the human condition of "but maybe I can make it work" so had to build a larger exhaust to find out!..but somehow wasted time in the workshop still seems like a positive thing!..I believe my friend does Know his stuff, He's built raced & won on British machinery at the IOM classic TT & is an amazing old character who I cherish spending time with so when he offered to do the exhaust calcs I figure its another opportunity to maybe learn something..& he may come up with the same figures as you guys have discovered work ...but its all just part of the motorcycling stuff that I love...Thanks for the Forum!

Title: Re: Valve timing
Post by Ruttly on 11/15/17 at 06:30:59

Let us know what you come up with diameter & length !

Title: Re: Valve timing
Post by batman on 11/15/17 at 09:18:14

I'm with Ruttly ,I'd like to hear your results. If you've read up ,you know that if your planning to keep the motor stock ,that the stock header,a Dyna muffler ,white spacer mod /rejet and a better air cleaner is the way a lot of us have gone. It gives a remarkable difference in driveability,and a bit more horsepower ,with very low cost,but I would never stop anyone from trying something else. I am on this site as much to learn as to try and help others. good luck!

Title: Re: Valve timing
Post by eau de sauvage on 11/15/17 at 14:13:13

deleted, posted in wrong thread...