MotoSamoa wrote on 01/03/19 at 12:32:17:What jets were required after removing the restrictor? I live in Samoa, where it is always about 30C and quite humid. I feel that it may be a bit lean standard, as it tends to pop and backfire like when it is running out of fuel.
I ask, as I will have to order them online and wat a month or so for them to get here, so I need to be prepared before doing anything
Hi MotoSamoa,
If you have a restrictor, removing it will not really affect which jets are right for the bike. I'm running a Dyna muffler (which apparently has very similar airflow to the stock muffler). I'm also running the stock air-box and filter.
You are correct, the bike is set up very 'lean' from the factory.
My adjustments are similar to Hiko's except I went a bit richer on the main jet, and if I recall correctly, a bit richer on the spacer mod. My spacer is between 0.3 and 0.4 of the original thickness (I used washers so I could tweak the thickness). My bike is probably just a touch on the rich side. I tried it a bit leaner. This gave slightly snappier performance but the engine ran a bit hotter and it introduced a slight 'lean surge' at low throttle. So I opted to tune out the surge and accept a slightly rich running condition. I get the occasional small backfire from the muffler when I change gears in the low range. However the weather (temperature, air pressure, humidity etc) affects the tuning, so the ride varies with the weather (we're talking tiny differences at this stage).
As for ordering jets - I ordered two steps below stock, and two steps above, for the pilot and main jets, so I could experiment with the setup. I ordered them here in Australia from these guys
https://www.mikunioz.com. They were only a few dollars each. The guy there was really helpful on the phone, after he told me the best way to get the most out of the stock carb was to tie it to a fishing line and use it as a sinker! hahaha
As for idle-speed, I have mine set to about 1400 rpm. I found that if I go any lower, the engine will cut out if I rev the bike and suddenly drop the throttle back (as in an emergency stop).
If you haven't already, I highly recommend this excellent thread on carb tuning -
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1309246277Good luck, and let us know how you go.