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Did both fans kick on? They have been known to stick if they never hit temps to spin. Both mine were stuck. I got really hot stuck in traffic when I first got the bike and needed up hitting the shoulder of the road and riding till the temp ce back down(one of the worse things to do is to just...

I'm not following on what is hard about the beak/headlight removal. On mine(which is the same for all 821/939) you remove the 2 Allen bolts at the bottom of the triple tree, pivot the whole assembly slightly and pull up to release the top from the rubber mounted grommets. This now puts the whole...

You could use one of those lock nuts with nylon piece. Thats what comes with the Starace RSR kit and it works really good. There is no need to overcome the locktite and possibly break something when it comes time to clean the filter(depending on what strength you use).

They were a little long for mine too so i trimmed the rubber on mine.

The fulfilmanet issue was many years ago, all have been corrected from what I read. He seems to be doing well. He is definitely testing new parts he is making . He has alos partnered with a few companies, Termi, CNC racing and Sprinter to name a few. I don't know for sure but I don't think those...

There are a few different techniques used in this area to help atomization of the air n fuel. The norm used to just be to clean up the intake and exhaust runners then polish to help things flow better(port n polish) but over the years it has been discovered that on the intake side it is better...

The 821/939 series now has some additional intake options. Dimpled velocity stacks coupled with the RSR filter housing it's sure to make a marked improvement. I will soon have a kit in hand, install them and report back. Pics are of Starace and OEM. OEM are rubber moulded one piece design. If...

I have 25000miles on it. When I set the belts I checked, double checked and checked again so I don't think it was tension issues. I do ride in the winter in mid michigan but the belts are covered and the bearings are sealed so that shouldn't matter. I'm guessing it's one of those things that...

Look at "adventures in hypermotard tuning" on this forum. I know it's for a 821 and yours is 939 but it's a great start. Input all the setting(read through till the end. He made some changes) then (if I were you) I would turn on auto tune but set the perrameters to a very small window of...

It was noticable by people on the streets. The guys at work asked if I added a supercharger. It had a decent wine to it. I could always hear it and it got louder as the rpm went up. It's not quiet enough I could just tune out. Could even hear it when the music switched songs.

Time for belts again. This will be my 3rd belt change. I have had a growing supercharger noise. I was thinking the worst, I was thinking engine main bearings. I am relieved to discover it was just belt tensioner bearings. The bearings could twist and wiggle from side to side. When out if the...

Correct, I ordered from WRS. I ordered it March 17th and it arived April 16th.

I have always been a fan of Braking USA rotors. I have run them In the past and then held up nicely. If I were to do something aftermarket today it would probably be one of the T drive rotors, the Braking Barfly(the SK2 is a great option too), one of Braketech's offerings or the fancy rotors...

It is the front and rear header?

My wife and kids got my bike professionally detailed for me for last Father's day and when I picked the bike up the owner came to me and showed me that that exact bolt was unthreading and almost out. We threaded it back in and tightened it so I could get the bike home but after torqueing it with...

Even though I'm 250lbs? Cant the stiffness be dialed out with the compression? The wire gauge of the oem vs the Mupo are about the same. So far it does not feel stiff at all. I realize that the 30% sag was achieved with very little preload but there is definitely room to back it off.

Here are the adjuster's. I think the color of the shock matches the the bike quite a bit better than the yellow did.

After much research I decided to bite the bullet and buy a rear shock. The 2 I narrowed it down to was Nitron and Mupo(I'm not a fan of Ohlins for silly petty reasons). Obviously I ended up with Mupo and so far I'm very happy. It came spring and set up for my weight along with a testing print...

You could also ask Dave Moss. He will answer general questions but if you want an indepth conversation them he asks for a donation. I have heard of people doing this with great success.

I'm no suspension guy at all but if you added the weight of the tail bag, could your spring be too soft now? Or am I thinking something different is happening ?