Pump Cone...

[1Scray]

Anyone using the wammiltons stubby pump cone? If so is it worth it? or should I just get a TBM?

Also, with a stock prop and motor is a pump cone worth it?? I am trying to avoid motor mods to keep it reliable.

 

[Proformance1]

I was running the R&D which is very similar. With the stock motor I dont know but with head ignition and pipe it helped a lot. I would say if you bored your stock venturi and steering nozzle and installed the TBM cone there is no way your pump would ever slip, but I'd start elsewhere. Possibly Factory pipe.

 

[1Scray]

Its so temping to just start moding the motor, but I need reliability due to time constraints, I am just going to deal and leave it alone for now. thanks for the input.

 

[Proformance1]

Reliability is not an issue I put a lot of hours and so have others on SXR's with B pipes, heads, ignitions, flywheels, etc. Most bolt on parts dont cause problems as long as you put them on correctly and adjust the carbs accordingly. I just dont think a pump cone is going to benefit a stock SXR, without other modifications. If you are planning other upgrades down the line, then go for it, every change I made to mine helped a little bit, but together they made a huge difference.

 

[rollin5150]

The freestyle cone will not help out as much as the TBM pump cone. I had one installed on mine, then went to the TBM and it was a world of difference. If you want to keep it stock then bore your reduction nozzle to 80mm, dry out your stock pipe, jumper out your air temp sensor and tune your carbs. Put the TBM pump or R&D pump cone in and either put in a Solas Dynafly prop or have impros tweek your stock prop and you will feel the difference.

 

[rollin5150]

Reliability is not an issue I put a lot of hours and so have others on SXR's with B pipes, heads, ignitions, flywheels, etc. Most bolt on parts dont cause problems as long as you put them on correctly and adjust the carbs accordingly. I just dont think a pump cone is going to benefit a stock SXR, without other modifications. If you are planning other upgrades down the line, then go for it, every change I made to mine helped a little bit, but together they made a huge difference.

I agree. I have had a wetpipe and head on my ski for quite sometime. I have logged over 100 hours on my ski without one issue.

 

[djkorn1]

I agree. A factory pipe (properly installed), milled head and lightened flywheel (by Group K or LPW) will not give you any reliability issues.... Good winter project.

Cone barely does anything...

I would bore your nozzle instead(to get a little more bottom end)

 

[X2Pilot]

I love the big hub cones, they made a big difference in hookup in race chop/whitewater on both my stock and heavily modified skis. For freeride it might not matter as much but for buoys its worth it.