Forum Replies Created
- Posts
Purposely did not call out any individuals to avoid the emotional blame game since many individuals have been DQd for this. Sorry to see someone chose to call out specific individuals and make personal assumptions. Was calling out whoever is making these tubes. Some who have been DQ’d may in fact be innocent recipients of them.
I put out an issue to get real discussion for the betterment of all. No ax to grind just want it cleaned up and stopped.Respect and know who puts in the effort so why hate someone who is trying to legitimize that effort by trying to stop cheating so it is very clear that those who have put in effort are legitimately deserving and celebrated, regardless of who that may be? I do apologize if the generalization of “times layed down” was too broad and some took it personal. There have been instances (not going to call out anyone but do the research on times before/after DQs) where at same track, same kid, same kart suddenly was nearly a second quicker than the field and after tube was found and seized, suddenly was back running previous times in the pack but short time later at CKT race at same track is again nearly a second plus quicker over the same competition. Couldn’t agree more that long term hard work makes that kind of change, not one or two weeks.
STILL WAITING FOR ANSWER: After three years of being out if 25% of any Rotax spec part prematurely wore out or came out of spec from factory causing multiple DQs at races – where is Rotax advisory to make reps aware of this defect? (small percentage of harnesses were bad and ECUs mis-labeled and EVERYONE knew about it) Not speculation – show me the facts, reports or posts substantiating “wear” or “factory out of spec” claims to this degree anywhere besides Colorado and I will gladly retract everything and sincerely apologize. I researched everywhere possible, including talking to experienced professionals prior to posting and can find nothing regarding tube non-compliance except references to cheating/modification.
If big teams are spending money to buy hundreds to get the max size legal then it is reasonable to conclude that having a larger diameter emulsion tube is a definite advantage and if they were buying hundreds, there should also be ample discussion and sample size reported on forums and at races regarding the large number of out of spec straight from the factory tubes.
If they don’t wear out and there are no reports that large numbers are coming from the factory out of spec then what reasonable, non-emotional
conclusion is there that out of approximately 40 Colorado carbs, nearly 25% have been found to be illegal?Hopefully, if nothing else, this thread will raise awareness of the issue enough that everyone will check and if they show up with an out of spec tube going forward and are DQ’d there is NO excuse and EVERYONE should call them out. Hopefully all series will be checking at the races so this will be a non-issue going forward.
Thank you all for your input.
Have done extensive search online for anything to do with Rotax emulsion tube wearing out or manufacturing defects. Nothing. With an estimated 40 EVO Rotax carbs running in CO and 8+ illegal tubes found (nearly 25%) this would be a world wide issue with much discussion and I would expect that Rotax would have produced an advisory or alert to its Rotax reps on this big issue as it isn’t a normal “wear” item. Have found several articles/posts about rampant emulsion tube cheating in Canada that was stopped when the responsible parties were called out but again, nothing on wearing out or anything else.
Please explain how with aluminum needle and brass tube, the aluminum doesn’t wear out at the same or faster rate than the brass? From what I can find, normal emulsion tube wear (ovaling) happens on machines that idle excessively (farm machinery, cars over 20,000 miles, etc.) where the needle vibrates in constant contact with the tube for long periods of time to wear away the surface or where steel or titanium needles are used on uncoated brass tubes. Ovaling causes poor engine performance, not enhanced. Rotax runs very, very little at idle (hopefully) and if you take off the air box, the only time the needle even touches the tube is at idle. If it was hitting the tube going in an out, there would be clear tracks in the brass from the needle strike or the surface of the needle would be clearly worn.
For fun, called Rotax engine builders on east and west coast asking if they have heard of this, without hesitation, first words were “cheater tubes” and they had never heard of emulsion tube wearing to the point of being illegal and have never experienced out of spec tubes from the factory.
Many Rotax racers have run the new carbs for over three years on the local and national level and tubes are well within factory spec but some locals have been DQ’d twice in 6 months for illegal tubes. Are they running sandpaper on their needles?
Happy to see/hear any Rotax specific data on the unusual wear on the tubes in Colorado or elsewhere. Happier to have the parties who are making/using them to step up and claim their handywork and stop it. As rampant (25%) as this is, any race results where tubes aren’t checked are in question and for what? A $12 trophy?
😯 Negative much? I’m sure the CSC crew lost their light sponsor and were working with Unser up to the last minute to try and find a solution. I’m also sure that none of this was planned or done to screw anyone over and they made very clear that if it made anyone not able to attend their entry would be refunded.
I’m also sure that Rotax is definitely at fault for all of the worlds troubles and arranged this change of schedule just to make your life miserable. :bangGreat job this weekend. A very fun event and Roger and Craig kept it running like clock-work! Great racing and beautiful weather.
Thanks to Lee, Ivey and the crew at SBR along with Danielle Hindsen and the registration crew for great work as always.
Mychron SOLD
Engine still available – very good proven micro or mini motor or great for a backup/practice motor. Open to offers!
