SXR Kawasaki 849 big bore kit by Group k
- Thread starter 849tigerbotkv1
- Start date
Octane_114
LeT tHe gOOd tImEs RoLL
- Location
- Charleston S.C.
I wonder why on the I-body carbs he uses a tube. on my 46 it's completely open.
- Location
- Cleveland Ohio
Shonuff, would love to hear more about what your running. What kind of gas are you running? Pump, Carbs...etc etc...Getting bored with my settup and want to go bigger.
849tigerbotkv1
formerly ihate5mphzone
- Location
- where i can ride 2stroke
Hey djkorn do you also have a bb849 on your sxr? Do you mind sharing some info on how to get this thing running right
- Location
- Cleveland Ohio
Nope. All my power comes from lighter hull, not engine mods. I have a wetpipe/flywheel. Everything else is stock motorwise.
On it.
Group K 849
ADA Big Bore girdled Head running 200psi (checked tonight) I run a 93/110 mix at 50:1
Currently have Art's "BlackJacked" SX-R carbs but I just bought 44mm BlackJacks to replace them (but since I only have one pulse line, I'm in a spot as to what to do now (reed spacers with pulse line?)
Stock intake
Stock Reeds
Stock Crank
Stock electrics with MSD enhancer (2003 electronics)
Jetinetics lightweight charging flywheel
FP Wet Pipe
TDR Waterbox
Solas Mag Pump with stock prop
I would like to follow you with a Trinity Boat
ADA Big Bore girdled Head running 200psi (checked tonight) I run a 93/110 mix at 50:1
Currently have Art's "BlackJacked" SX-R carbs but I just bought 44mm BlackJacks to replace them (but since I only have one pulse line, I'm in a spot as to what to do now (reed spacers with pulse line?)
Stock intake
Stock Reeds
Stock Crank
Stock electrics with MSD enhancer (2003 electronics)
Jetinetics lightweight charging flywheel
FP Wet Pipe
TDR Waterbox
Solas Mag Pump with stock prop
I would like to follow you with a Trinity Boat
On my 44's it's completely open.
Octane_114
LeT tHe gOOd tImEs RoLL
- Location
- Charleston S.C.
- Location
- Cleveland Ohio
Thanks! Go with the hull, but I'd go -4 for sure if I had it to do again. The power increase from the loss of weight is unreal. It is more of a power increase than the pipe. If you were me, what would you go with next? Carbs? Porting? Compression? (I'm only at 155). Can I throw some Mikuni 44's on my stock intake? Just found a pair...
If you don't mind eating a crank in the next few years, I say get it up to 200 or so. I don't like buying race gas but I LOVE the way it smells. My wife, inexplicably, does not.
I'm with you on the carbs, I just picked up those blackjacks and am about to do my own porting on my intake . . . so . . . I may be buying a new intake soon after I f**k mine to oblivion.
Then send it to Art in the Winter for porting. Killing a crank is just God's way of saying get a stroker.
I'm with you on the carbs, I just picked up those blackjacks and am about to do my own porting on my intake . . . so . . . I may be buying a new intake soon after I f**k mine to oblivion.
Then send it to Art in the Winter for porting. Killing a crank is just God's way of saying get a stroker.
- Location
- Cleveland Ohio
man, stock cranks are cheap...strokers, not so much.
- Location
- Cruising Around
Cheap crank gets pricey when it cracks your cases. You might want to give Tim at ZForce racing a call about porting your motor, he does good things with Kawis. The SBN 44 will probably not give you much if anything over the 40 I body (38). Put some SBN 46's on a ported top end with 180psi and you should have a very fun ski IMO.
- Location
- Cleveland Ohio
So everyone seems to say...compression/porting first. When I rebuild this winter that will be the plan.
Cannibal
Tasty Human
- Location
- Summit Lake, WA
BTW, I have some of Art fully Blackjacked 40mm I bodies, he doesn't do the mod anymore on them because you can't get them tuned perfect, they load up a bit at certain circumstances and make you think you need to lean it out a bit more (I know this from experience). He now does the thin tube atomizer on them now, just like he does with the Yamaha 38s.
I'm also getting some BJ44s from him to replace the 40s. Yes the cross over is filled as well. If anyone wants to give these a go, hit me up. I'd let em go for $225 with manifold.
For my setup, Art rebuilt my crank, ported my cylinder, 84mm Wiseco (820cc), JSU head (can't remember dome size), Jetinetics flywheel, Art's own curve in my Advent, and Power Factor pipe. I'm pretty happy with it. I need to work on my pump more and get it and impeller match to the engine (or get a mag). I just haven't had much time to play with it this last year. It doesn't hit as hard as I'd like down low, but it's obvious when it gets on the pipe.
I'm also getting some BJ44s from him to replace the 40s. Yes the cross over is filled as well. If anyone wants to give these a go, hit me up. I'd let em go for $225 with manifold.
For my setup, Art rebuilt my crank, ported my cylinder, 84mm Wiseco (820cc), JSU head (can't remember dome size), Jetinetics flywheel, Art's own curve in my Advent, and Power Factor pipe. I'm pretty happy with it. I need to work on my pump more and get it and impeller match to the engine (or get a mag). I just haven't had much time to play with it this last year. It doesn't hit as hard as I'd like down low, but it's obvious when it gets on the pipe.
Last edited:
Octane_114
LeT tHe gOOd tImEs RoLL
- Location
- Charleston S.C.
did are put the thin tube atomizer on yours now?
IceRocket1286
Site Supporter
- Location
- Metro Detroit
Not sure how far along you've come with the pulse situation, but you can do the reed spacer as you've said, or you can drill your rear side of the case for a new fitting. I actually just T'd off the stock fitting and ran it to both of my Novis....yes, it works just fine. My recommendation is to go the reed spacer route if you dont want to T anything off. You can order the Brass barb fitting that the pulse line hooks to from Kawi, it has a part number. Drill to the appropriate size and tap them in with a brass hammer and some green loctite. I did this on a few motors and never had an issue.