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Wondering if anyone has milled the dome area of the piston to lower compression? It appears on a nytro piston there is a great deal of beef in the dome? I am going to gas port the pistons anyways so I figure maybe a better way to lower compression than a head shim becuase it will allow the...

I am going to be putting a mpi supercharger kit on a vector engine. Wondering how the jetting works with the supercharger? Is stock jetting used? Does it need to be rejected for elevation changes? I tired searching and have not found anything. Likely call mpi this week to see if I can...

Well maybe aloof you recall my past builds. First a custom turbo kit on a vector then moving the vector motor into a rev chassis. I have been riding a 1100t for the past couple years and this summer I decided I wanted to build something once again. I am going to take what I learned from...

Does anyone know the CTC measurement of the jackshaft to driveshaft for a rx1/apex style chaincase? Or have on that they can measure and let me know? Thank you in advance.

Ever seen this. This is a nytro block. I thought it would have def had a broken rod, spin bearing, or at least something. The crank rods, head and pistons are all perfect. Any idea what would cause this crack. No crash either?

Does yamaha make a variety of rod and crank journal bearings to allow for grinding of the journals on these motors? Or is it pretty much buy a new crank? Anyone have any info on rebuilding these motors? Or have the link to the shop service manual?

Ok, So last trip out west I had issues with my jetting on my sled(yamadoo with turbo vector motor). Now I have a different pitot tube setup, more like the way powderlites/alpine was on the vector. I have the sled running right where I want it here(1000'). We are going out west for a very...

Looking for a blue/white/blue primary spring. The dealer here seems to be wicked slow so I figured i would see if anyone has one that can ship today, and be here by mid week. I would like a new one but a lightly used one would work too. PM with price and paypal details.

Well, I am going to be trying to put a nytro fuel injection system on a carbed vector motor. The only major problem I am seeing currently is the carb boots and throttle body boots are different this won't be a big dael as I will just machine new flanges for it. But how about the crank...

So. . . . . I am sitting here, I have checked the following. Cylinder Leak Down. . . . OK Compression Test . . . . . Seems low but equal Cam Timing. . . . OK TPS Sensor Resistance. . . . OK Trigger Coil Resistance. . . . OK In review the sled feels like it is only making about 150 hp...

So I am wondering does the TPS control the ignition timing or is it not that complicated on the Vector? I have a turboed vector motor and I am fighting getting it to run right and I am trying to eliminate all possiblities.

I have been thinking for a while now I would like to give the NM fuel Controller a try on my vector. Couple problems though. How could I still use the carbs, and make them not add fuel for boost and not blow fuel out. If I vented them to the atmosphere I would think that they would not...

So I went out for a little spin tonight on the yamadoo. I was not on it extremely hard. And I look down and the header is red hot. The Turbo housing is red hot and I can see on the downpipe O2 bung that the downpipe is red hot. Is this normal? If not what is going on...

Ok I have a yamaha vector motor in a rev chassis. I was having what I thought was problems with the motor or turbo setup. And Now I think I have found out that the clutching was not even close to making it work right. Here is my current setup. Primary spring blue/pink/blue 8bu-00's...

Ok, here I am working on my yamadoo. Problems I am having is that it just doesn't seem to run right. It should be just making wicked power and I just don't think it feels that much better than the new 800 polaris sitting in the garage. I have the afr right where is should be now and...

Ok i am still having issues getting my sled tuned. It doesn't feel much better than the 2011 800 Rmk sitting in my garage and that is just not right. I need some motivation to work on the sled. I guess what I am looking for is a someone resonably close with a vector, nytro, rx1 with a...

So here i am thinking about my pitot tube issues. I have just way to muych pressure reference from it. I posted before and I got alot of good discusion. So here is what I am thinking. Can anyone tell me why Powderlites and boondockers tee'd the reference line back into the carb side of the...

So here i am thinking about my pitot tube issues. I have just way to muych pressure reference from it. I posted before and I got alot of good discusion. So here is what I am thinking. Can anyone tell me why Powderlites and boondockers tee'd the reference line back into the carb...

I think it looks way to black. . . . . . But i am used to looking at 2 stroke plugs. In the one pic i looks speckled but I can't see it other than that pic. I will take it to work and look at it with a eye loop tommorrow. Just looking for some opinions. Thanks

Ok heres the deal. Last year I ran my vector with a custom mid mount turbo system with a stainless charge tube with a different style pitot pickup. It was a 3/8 straight tube through the charge tube with a .125 hole facing towards the turbo. I ran a mikuni jet in the one end of it and the...