Christof13T wrote on 04/01/18 at 06:28:45:


And that is exactly what should happen on a bike that is jetted properly.  When you close the throttle completely, you have shut off the fuel flow from the needle jet........and the fuel mixture is lean as the only fuel is coming from the pilot circuit.

The cure....is to learn how to use your throttle hand - gently roll the throttle off a bit as you shift....don't let the throttle go completely closed.  When decelerating - closing the throttle completely will make the bike noisy......open up the throttle just enough to make the noise go away.

For some reason....the TEV valve just isn't able to completely eliminate the lean condition when the throttle is closed.....perhaps because it was created in a time when E10 fuel was not being used, and it may work better if you are using pure gasoline.

Yes...my suggested method works well with the VM carb - but it also works with the stock carb.  The popping/banging during deceleration or shifting is hardly noticeable when the stock muffler is still on the bike - the more open the muffler the more pronounced it becomes.

It is interesting how differently Suzuki and Kawasaki approached the noise issue on deceleration.  Suzuki chose a TEV valve that provides a bit more fuel under high vacuum conditions - while Kawasaki chose to close off the air to the pilot jets under high vacuum conditions....which also allows more fuel (and less air) to flow.  (The Kawasaki method seems to work much better as it never pops/bangs - however on their forum they report the bike gets noisy when the diaphragm does bad).

batman wrote on 04/01/18 at 18:12:50:


I don't know about the fuel where Chris or you live......but all of our local gas stations sell E10 in 87, 89 and 91 octane, and we don't really have a way to buy fuel without ethanol.......and to make it worse all the local counties have to use reformulated fuel (Cincinnati metro area).  If you want to go riding around the area and not be restricted to where you go....you have to be willing to accept the fuel that is available where/when it is time to buy fuel.  If you want pure gas in this area you have to go to a marina......and the pumps are out on the docks and not easily accessible for a motorcycle.  If you want fuel that is not reformulated - you have to drive outside the Cincinnati metro area.

Premium E10 is not my fuel of choice and it would be great if I had a workable option - but I have never had any detonation issues when running it.  I do take care to only fill up when my tank is pretty low - as the fuel in the hose of the blender pump is likely to be 87 from the previous person who used the pump.  

batman wrote on 04/02/18 at 08:25:15:


Is that a rumor.....or you know it for sure?  A local motorcycle shop swore that a Shell Station in Pendelton County didn't have ethanol in the premium fuel - so I went down to get some and I took a bottle to test it with. The truck that delivers fuel showed up while I was there - and I asked him.  He confirmed that all the fuel has ethanol - the truck delivers 87 and 91 octane and both of them are E10, and the blender pump combines the two octanes to get the mid grade 89.

Here is how you can test fuel to see if it has ethanol in it.

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1339974217/6#6

Pretty much all of the pumps in the area are stickered with 10% ethanol.
I put the 93 stuff in it when it is available.
The lowest it has had in it on this go around was 91.

It got windy bout the same time I felt like going riding yesterday... But the weather looks great right now. I may run out and open it up real quick like on camera and get you fellas' take on how it is performing.

batman wrote on 04/02/18 at 12:48:59:


Did we just become best friends?

I'm looking for a daddy and I'm house broke.

Tell me you didn't just intentionally fail to get it.
You're Bat.