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VP U4.4 and T4

Joined Jan 2014
186 Posts | 99+
Central Point, Oregon
I run VP T4 in my stock fe650 and just started running it in my stock 505XCF. There is definitely some performance enhancement with this fuel.

Interestingly I feel more enhancement in the 650 than the 505.

Has or is anyone running VP U4.4, is it worth it and what jetting changes did you make?

Thanks!
 
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I run the T4 as well. Seems to run a little better than pump fuel. And I was also curious about running 4.4.
Funny Big Berg same question,same restoration.
How's the old Berg' coming along? I've acquired all new oem plastic and fuel tank. Going to go all out,as funds allow.
 
I run the T4 as well. Seems to run a little better than pump fuel. And I was also curious about running 4.4.
Funny Big Berg same question,same restoration.
How's the old Berg' coming along? I've acquired all new oem plastic and fuel tank. Going to go all out,as funds allow.

Still working with Taffy to get the 92 plastics kit together for which I gave a fat down payment on.

I still need the rear fender and fork guards and guides. I would be satisfied if I/he could find the correct rear fender. I would then pay to have the original fork guards and guides restored.

If you have any leads let me know!

Thanks!
 
I found an actual test of the Berg'.
Motocross Action August 91'.
It's about the only info I could find on her.
It shows Acerbis fenders on it from the factory.
You can still get the front fender from Acerbis. I had to get it directly from them. No one seems to carry it in yellow. It's called a Nost fender. The same applies to the rear. But,they don't make it anymore. I turned a new one up on eBay. Took a while. My project bike has the correct stuff,but terribly oxidized. Taffy has the correct seat cover if you need. He's slowly draining my bank account too. And yes,I'll have to clean up my fork protection as well. Can't seem to find those yet. It appears to me early KTM's used the same piece.
And I'm not sure how to deal with graphics. You? Are we going to have to suck it up and have them re-popped?
.
 
I am going resto/mod and I know that is blasphemy to some Bergers. So I will use newer front fender and number plate, but want to retain the other OEM looking plastic. Seat cover and graphics will be custom of my own design. I really need the dang rear fender and I will be moving along good.
 

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