Engine sound decel

[Jakobi]

I am quite pleased with the S3 high high. Bit feels much crisper all the way through. Engine characteristics haven't changed much at all. Just crisper and stronger everywhere. Jetting wise I have came in a turn on the pilot AS, and moved the clip half a position richer and it feels good.

I can even move the needle to clip 3 now without the bike becoming a complete blubbering mess that previously was unridable, however there is still a rich burble at 1/4 throttle annoying on clip 3, noticable on 2.5, and gone on 2. Moving to 1.5 which was my original setup is super crisp but my be too close to the edge for my liking.

 

[nambo-trev]

Hey jakobi what compression insert(color) did you put in ?

 

[Jakobi]

The black one Trev High High Ho Ho! But as mentioned, squish band isn't all that tight and pretty safe. Compression doesn't feel that much more under foot.

Looking at the head inserts side by side I'm not sure if there is actually any difference in bowl volume/shape. The difference is in the height before it starts. Effectively the same as if you shaved material from the stock head.

I'm taking it for a ride tomorrow morning around the place. Will hook up some video for viewing pleasure!

 

[Jakobi]

http://www.youtube.com/watch?v=JSm46ermdPE

 

[mrkartoom]

Can't turn the audio up too loud at work, but it sure does sound very crisp. So the squish changes would seem to lessen or eliminate the dramatic changes with needle clip adjustments, pretty much as we have been advised by GMP and others.

 

[Jakobi]

Can't turn the audio up too loud at work, but it sure does sound very crisp. So the squish changes would seem to lessen or eliminate the dramatic changes with needle clip adjustments, pretty much as we have been advised by GMP and others.

With squish at 1.8mm I'm still at the larger end of where we want to be, but yeah. Its definately made things much more stable/given more options I guess on the jetting front. So far best setup even with the new head is the same same 38 N3CH#2 178. Its crisp and snappy off idle.. smooths out a tad just below band and then punches back to life hard. If anything it might be a little lean right in the middle.

Unfortunately I still can't get the idle right. I can get it to idle well at one point albeit a tad low. Turning up the idle screw lifts the idle, but then it seems to hang after a blip of the throttle. Does this mean my pilot is too small, or am I too lean on the needle?? I need to do some more research but its so painful wasting a day and tyres away just doing runs up and down the road, especially when theres other things to be done!

 

[mrkartoom]

I'd think pilot, but that's what's confusing - if I go bigger I get the blubbers. You'd think it would go back to a consistent idle pattern when the slide is back to the stop. I've got the 8.0 slide I've yet to test with, so maybe that will get it into a range it is happy with. I've been doing nothing but traveling for weeks now and no testing, but I know what you mean about fiddling and testing all the time instead of just riding and having fun.

 

[Jakobi]

Thats what I find too re the blubberies.. I am willing to throw a 40P in and have another go to see where we end up!

 

[Jakobi]

I think it might be right as the bike fires right up with the choke on, runs with a nice high idle until its chugging in its own fuel, but then after taking the choke off it needs another 30 seconds of blipping to maintain an idle. If I can get the idle up a bit higher without it hanging on me I will be one very happy camper! Then it'll be back over to the main to start downsizing that.

Given my clip position and pilot I could very well move to a leaner main aswell compared to others. I always ran a 175 and have only moved to a 178 for safety. No doubt I could slide it back to a 172 for max output. Rip rip!!