Which Big Bore Kit is the best out there at the moment for the 800 HO?

J

Joe.G

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Jan 7, 2017

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• Nov 19, 2018

• #1

My Buddy wants to put a BB Kit on his 14 ZR 8000, What kit is producing the best power and still reliable for trail riding?


I know D&D has a 901,

Speedwerx I think is a 925,
Bikemen 940
and SSI 950
He wants to stay around the $2,500- 3 K range. Thanks

 

idacatman2

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Ashton, ID

• Nov 19, 2018

• #2

Had great luck with the bdx/ssi 950 all last season.


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J

Joe.G

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• Nov 19, 2018

• #3

I see they offer 3 different options, which did you run? Did it produce the power you thought it would?

 

K

kiliki

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• Nov 19, 2018

• #4

https://www.snowest.com/forum/showthread.php?t=443394

Stock cat at my alt runs 68 g this was running 77g.

 

boondocker97

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• Nov 19, 2018

• #5

I've been really happy with my 900 BMP kit. I feel like it's putting out the power they advertise. It's the full $4k kit though. And when I got it through BDX on the Pro-lite package sled It didn't come with the timing key installed. Kevin at Hubs Performance set me up with a Power Commander with timing and it woke it up noticably. 2500ish miles on it now. It's getting a new set of reeds now, but it could have used them a while ago. I will say the BMP powder lite muffler was louder than I cared for and didn't fit the best. I also had to put a weld on the pipe on the underside where the mount is above the clutch. This was at 1800 miles. It's not the only aftermarket exhaust I've had to reweld after some miles.

 

Last edited: Nov 19, 2018

idacatman2

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• Nov 19, 2018

• #6

Joe.G said:

I see they offer 3 different options, which did you run? Did it produce the power you thought it would?

Click to expand...

I ran it with the high compression head and I used the slp complete exhaust I had with the stock injectors. It pulled really hard better than some pump gas turbo setups I ran across. I ran mds weights in the primary clutch and a team tied for the secondary


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K

kiliki

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• Nov 19, 2018

• #7

Sad part is I wish this kit would have transferred over to my 19

 

J

jim

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• Nov 20, 2018

• #8

What elevation? BB work great down low...but up higher, turbo is king. Looking at model, assuming you are low?

 

J

Joe.G

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• Nov 20, 2018

• #9

Yes we ride below 3,000 ft I see the one for sale is for 6k and up guessing the head is different?

 

K

kiliki

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• Nov 20, 2018

• #10

Just the head inserts are different

 

dgibbons

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• Nov 20, 2018

• #11

Have always heard good things about the RK Tek 925 as well, but can't speak from experience. Just didn't see that one on the list. Know it used to be very popular.

 

B

BlueDevil

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• Dec 16, 2018

• #12

I have about 1300 miles on my rk tek 925 and never had an “engine” issue but rk tek’s Tuning sucks! Once you get it tuned it runs hard

 

B

BlueDevil

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• Dec 16, 2018

• #13

I ride 7-10,000 ft and run a stock pipe

 

J

Joe.G

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• Dec 16, 2018

• #14

I spoke to RK on the phone and they were not the most helpful I was looking to buy some parts from them last year but ended up going with another company. The SSI Kit seems to be well liked.

 

F

firecat225

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• Dec 17, 2018

• #15

I'm hoping there are more reviews on the 950 ssi kit. low and high elevation, I've heard they like using a double base gasket down low because of tight squish.

 

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rbblrsn

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• Dec 18, 2018

• #16

I've found Kelsey at RK Tek to be very helpful and knowledgeable, and his 925 kit is the one that produces HP the other manufacturers strive to meet.

 

M

madsledder

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• Dec 23, 2018

• #17

I had a rkt 925 on my old 08 m8. Ran awesome on that sled. if I do my 17 mtn cat it would be rkt or maybe ssi so I could keep my jugs. For now I think im just going to get a jaws pipe. But im 3-8000'.