Chris
Do you know how to take apart the, LOWER hub, cv-joint? I am going to cut and put on a knew
spline on the Joyner axle to fit my 800cc cv-joint, if I could figure out how to take mine apart to get
the spline size.

or is this possible at all ?



Joe

 

I got tired of trying to figure it out, I sent my axles to Sean at Superkart. He is supposed to be fabricating a set of plunging u-joints to fit our buggies. It has been two months and he still does not have anything, but I am hoping it will be worth the wait. If he gets this figured out, I believe he will begin to sell the completed axles to others.

Chris

 

I just wanted to say that although I dont own one of these buggies. I really enjopy reading about them. [img]i/expressions/face-icon-small-smile.gif[/img] I may get one some day, or maybe not. [img]i/expressions/face-icon-small-wink.gif[/img]

 

joe; the problem with the noise is still an ongoing thing. the man found that the valves were real loose so he set them at specs, he also changed his oil and is now using 20/50 castrol gtx. the noise seems to be gone, but he will know for sure when he takes it out on a ride around his place.

chris; the axel issue has not come my way yet, but I think im going to explore the u-joint slip coupler cure. you can buy short 4 wheel drive drive shafts at just about any junkyard and adapt them to your spline side and slipspline side with little problem. but if sean comes up with slip type axel to buy off the shelf id go that way in a heartbeat.

mike

 

with all the trobs and tribulations you folks have had with the mamba's, would you recommend them?

 

I do not have a mamba, so I can not speak to them specifically. I own the 800cc Cheeta which is no longer available, but is based on the same Roketa platform. I was one of the original owners of this model and got it for a steal, so I expected some of these issues. If you are interested in this type of kart, and can spend a little more, I would recommend going with Joyner or Superkarts. They are using a slightly different platform and have some of these issues worked out.

At this point, I am not unhappy with the purchase, just a little frustrated with working out the bugs. I believe that it has lots of potential, especially for the cost.

On a side note, Sean is sending back my axles. He is getting the final numbers together on a fix. It will likely run about a grand and include plunging axles from Blumenthal with the U-joints and new machined splined shafts. It will be expensive, but should be a permanent fix. He will then need to find out if it will be cost effective on his part if he needs to purchase equiptment to do this. Once I get mine back, I will take it to the shop I found that specializes in shortenting axles for racing. They should be able to get me some answers even if Sean is unable to get us a solution.

Chris

 

Hi Mike,

Do you know if the ratios that you have listed below are for the model year 2006 or model year 2007 for the Roketa 800cc? We are possibly going to be buying one directly from Roketa and want to make sure we get the right one.

Just to confirm from your notes -

The old ratios for model year 2005 are:

1st-3.583
2nd-2.167
3rd-1.333
4th-0.900

and the new ones that should be on 2006 version are:

1st-3.9091
2nd-2.8
3rd-1.8
4th-1.0357

Do you know what the ratios are supposed to be for the 2007 model?

Just want to make sure we get the right model year - your insight is greatly appreciated.

Thank you,

Sherri

 

I would hold off until you can get assurances from the seller that the transmission ratio is the lowest one.

there seems to be a lag on the new transmissions arrival here and their addition to the new buggies.

I know that the dealers are waiting to get their hands on the buggies and have their techs make sure the lower ratio trans is in them before they stick their collective necks out again and state that the upgrade is for real.

mike

 

Thank you Mike.

I just want to clarify the definition of a lower gear because it looks like the numbers on the newer versions for 2006/07 are higher and for 2005 they are lower??

The old ratios for model year 2005 are:

1st-3.583
2nd-2.167
3rd-1.333
4th-0.900

and the new ones that should be on 2006 version are:

1st-3.9091
2nd-2.8
3rd-1.8
4th-1.0357

Which of the numbers above do I want to ensure that I have when I buy our buggy?.

I apologize in advance for sounding ignorant and again your input on this is greatly appreciated! [img]i/expressions/face-icon-small-smile.gif[/img]

Sherri

 

"LOWER" ratios are numerically higher. And visa versa. For example, a 4.10 ratio would be a "LOWER" gearset than a 3.55 ratio.