Further evidence that my "completely stock" Superhawk is not! Does anyone recognize this needle? I was wondering whose jet kit it came from.

Thanks,

Steve

 

Hard to say with the clips obstructing view of the grooves. How many grooves does it have?

Dynojets have 6 grooves, I think FactoryPro has 5.

 

The needle has 5 positions. I have never seen a stock superhawk needle but this one has a big change in diameter at the sharp end. I guess that would effect the upper half of the power band which isn't a bad thing.

Steve

 

It doesn't look like the needles in my DJ kit.

 

If it has five grooves, it's almost certainly a FactoryPro needle. Check the main jets, report what they are and you'll be well on your way to getting informed advice on what to do.

 

That's a FP jet kit. I'm going to go so far as to guess that your bike will have a 172 front/175 rear main jet, and #50 pilot jets.
PS, remove the shims that are under the c-clip. Those are pointless.

 

Yeah. The fact that they are there is proof that whoever set up the carbs didn't know what they were doing. Better go through them from start to finish.

 

I thought the shims seemed silly. I just wanted to remember what was in there and put it back together. The guy I bought the bike from swore it was stock!

Thanks for the input.

 

1 flat washer needs to be under the clip & the other washer may be a 1/2 clip position adjustment...

whether you put it back the same way would depend on how it was running.

+1 to it's a factorypro needle.

tim

 

Re; the washer representing a fractional equivalent of a needle groove-

Either the PO was a highly sophisticated tuning genius or he didn't know his *** from his elbow. If the bike isn't running right, put your money on the latter.

 

From looking at it, the fact that the washer equals about ½ a groove each, with two there he could just have moved the clip... I'd put my money on the latter option...

 

Perhaps you folks shouldn't be so quick to judge in regards to the washers under the clip. I know, for example, that there is a kit sold called the 5/20 kit which allows you to fine-tune your needle position (one needle position being equal to 0.040", the shims went from 0.005" up to 0.020"). In fine-tuning my bike, I experimented with different washers and shims (including a plastic washer sold by Yamaha for some of their sleds, 0.016"). I am currently running one washer under my clip (0.032") in order to get the needle right where I want it but had played with different set-ups (including two washers) on the way to ending up where I am now and beleive me, if you tried my VTR, you certainly wouldn't think I was crazy or had lost the script. Now, without knowing more about the size of the washers involved in the pic, it could be that the PO was doing some fine-tuning (although more info is needed to be sure).

 

I agree that you can use washers to fine tune... No mystery there...

My assesment was based on the visible thickness of the top flat washer being about the same as the distance between grooves... But agreed, a caliper is waaay more accurate than my eyes on a picture...