By joining you will help ensure that we can continue to provide this service
JOIN HERE!
Valve Spring Constants R11
Valve Spring Constants R11
Is it necessary to have to two springs per valve as noted in the parts list.
If so, what is the combined spring constant and how is it divided between the two springs?
Also, is there any preload with the lifter?
Many thanks again to all that help.
I would say yes to both. They
twocams
92 R100RT/69 R69S
2004 Aprilia Atlantic 500cc single cylinder Scooter
83 Honda V65 Magna, fastest production bike in1983
2015 Can Am Spider SE6 1,688 miles
2018 Moto Guzzi V711 Special
TwoCams, Thanks for the
Thanks for the reply. My engine is more or less the same as an R12 engine except with geared timing. When I took it apart it only had a single spring per valve, and I had missed the call out in the parts book for two springs until just this past weekend. I was just wondering if anyone could explain the mechanical advantage of two springs to one and if this was an absolute must. Otherwise I thought it might be good to know what the spring constants were for possible vibration problems.
Thanks
I guess you could use just
twocams
92 R100RT/69 R69S
2004 Aprilia Atlantic 500cc single cylinder Scooter
83 Honda V65 Magna, fastest production bike in1983
2015 Can Am Spider SE6 1,688 miles
2018 Moto Guzzi V711 Special
-
- Posts: 142
- Joined: Fri Oct 27, 2006 3:00 am
Why 2 valve springs ?
Only reason I can think of is that if one spring breaks the valve will not drop into the engine and destroy it but will alert you to a problem as you should develop valve float.
Anyone think of another reason ?
I would have a problem with replacing 2 springs with one .
Bill
Side valve opposed
It's a side valve, opposed 2 cycle, so it's impossible for the valve to fall into the engine any father than the closed position. But the redundancy theory is a good one. Might make sense for that time period. Thanks for the input.
Jason
I can't add anything re the
I don't know the individual spring rates but both the new and my originals feel soft compared to other engines I've done. That said these engines don't rev very high.
- caker
- Posts: 201
- Joined: Sat Nov 12, 2011 10:49 pm
- Location: Haddonfield, NJ, USA
- Has thanked: 1 time
- Been thanked: 5 times
My understanding of two valve
-Chris
2 springs on valve
While we are on this subject , can anybody tell me if there are marks on the distribution for its timing ; I need to dismantle my R11 engine because of a bad noise from the crankshaft . Anybody has a factory book for this engine ? I only found the user book and the spare parts book . Thank you for helping .
JC
Not sure what your asking re
I've never seen any workshop type books for these bikes, would be nice if there was.