Wolverine 450 jetting questions/help
#1
Wolverine 450 jetting questions/help
I am having some issues jetting my wife's Wolverine 450 after installing a GYTR exhaust and K&N filter. We are at about 900 feet and was around 50 degrees when testing. I am starting to wonder if the stock jetting on this machine is a little rich? I have been trying to avoid spending the cash on a full dynojet kit being that I have quite a range of Mikuni jets lying around. The stock Mikuni jet is a 131.5, HMF recommends a 140 main and I have read that its a little too rich for some. So....I started with a 137.5, ran good until top end. Top speed stock was about 53mph, with the 140 it dropped to 48mph. I removed the airbox lid and gained 1mph. So, I put the lid back on and dropped one jet size to a 135 and got it to 50mph. Reluctantly I dropped down to a 132.5, one size larger than stock and it tops out at 51mph, pretty close. Just for giggles, I removed the lid again and it jumped to 52mph on several runs. So it seems that with the lid on, I should drop it back to stock...........but its really confusing as to why this would be the case. I have jetted at least six other quads over the years and always jumped at least one main jet size after a slip-on exhaust.
To add fuel to the confusion fire, according to the instructions online of the dynojet kit, below 3000 feet with a high flow exhaust, they recommend a dj132............which a conversion chart says is equivalent to a Mikuni 124..........5 sizes smaller than stock!!!
Sorry for the long post, I am just really perplexed about this situation and wondered if anyone could give me some insight or at least what jetting you are running at your elevation?
Thanks
To add fuel to the confusion fire, according to the instructions online of the dynojet kit, below 3000 feet with a high flow exhaust, they recommend a dj132............which a conversion chart says is equivalent to a Mikuni 124..........5 sizes smaller than stock!!!
Sorry for the long post, I am just really perplexed about this situation and wondered if anyone could give me some insight or at least what jetting you are running at your elevation?
Thanks
#2
#3
#4
yes i first bought a 135 and 140(stock is a 132.5) and the 135 was kinda rich and the 140 was blowing black smoke! im thinking i need a bigger pilot though, i can get rid of the hanging idle by having the choke out 1/4, and the idle adjustment all the way in. The topend is perfect, no spitting or sputtering. and low end is great, a little tug on the bars and the wheels come right up! i just dont like the fact it like the stock jet! i will hopefully get it tuned perfect sometime.
#6
Snorkel jetting
If you really want some jetting fun about 5 hours worth, snorkel the wolverine then jetting becomes fun. I ended up with stock jet 131.5 and stock pilot jet I have the needle clip from the FMF jet kit at the second slot from the bottom then 2 full turns on the fuel mixture screw and finally got it right I had a real aggravating lag between idle and mid range. i tried every combination before I finally got it right. The tech at FMF said after snorling it always runs lean and that is not right in my case.
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