4stroker Posted July 22, 2009 Report Share Posted July 22, 2009 My buddies 7mm trex is chewing through reed petals at an alarming rate. when its running, it runs good, real good. at one race meet (flat track) it progressively got slower all day before finally stopping altogether. upon tear down it was found that a reed petal off the left blcok had completely vanished, and all the rest were frayed and damaged. all the screws were tight. he put some brand new petals in it,, and after 3 race meets, (not even 40 laps) it did the same thing, only this time it was the right side. all the other petals were damged too though, they seem to be deteriorating at the roughly the same rate, just whichever one happens to let go first stops the motor... has anyone seen this or had it happen before? we are thinking they are hitting against wall of the reed blcok area on the cylinders. like they need some sort of stopper or something? thanks, mark Quote Link to comment Share on other sites More sharing options...
Natemills8 Posted July 22, 2009 Report Share Posted July 22, 2009 if the reed padle just vanished they is only one place for it to go & thats in to the cylinder.Ive got v force 2 I dont know the life span I honestly would like to know too I need some new one but reed padles dont just vanish Quote Link to comment Share on other sites More sharing options...
FireHead Posted July 22, 2009 Report Share Posted July 22, 2009 On my triple from a fre years ago, I would get about 200 hours on the engine dyno before I needed to turn the reed petals over due to the tipsbot seating flush on the cages. My old 10mil didn't show any where after about 100 hours total. My red bike doesn't have much time on it..... What you can take away from all that is that something usually let's go before the VF3 reed petals reach the end of their life on a properly functioning engine. Quote Link to comment Share on other sites More sharing options...
TwistedSheeRida Posted July 22, 2009 Report Share Posted July 22, 2009 i have ran my bike for over two years and i bought it with them and i havent had to change them yet. Firehead you put 200hrs on your bike on a dyno! thats ridiculous Quote Link to comment Share on other sites More sharing options...
4stroker Posted July 23, 2009 Author Report Share Posted July 23, 2009 does anyone know if v force 3's are available for the trex? Quote Link to comment Share on other sites More sharing options...
FireHead Posted July 23, 2009 Report Share Posted July 23, 2009 Firehead you put 200hrs on your bike on a dyno! thats ridiculous Generally I am not working with the stereo typical dynos people are familiar with....... The engine and chassis dyno's I deal with are quite advanced. The 200 hour deal refers to time on an engine dyno attempting to develop a new Banshee'ish engine. :geek: Quote Link to comment Share on other sites More sharing options...
FireHead Posted July 23, 2009 Report Share Posted July 23, 2009 does anyone know if v force 3's are available for the trex? Refresh my memory: What is the OEM application for the reed cages the T-Rex cylinders use? Quote Link to comment Share on other sites More sharing options...
4stroker Posted July 23, 2009 Author Report Share Posted July 23, 2009 we bought some stock intakes from our yamaha dealer for it once and i think they were off an '86 YZ250?? ill have to check that! Quote Link to comment Share on other sites More sharing options...
TurboBanshee420 Posted July 23, 2009 Report Share Posted July 23, 2009 mine made it about 100hrs now and have minimal freying on the corners.....time to replace though. Carbon fiber reeds suck! Sounds like they are slapping the reed box to me... That is one of the reasons why I use reedspacers, but I cut them down to .250 on the mill. No need for a full .500. Just pulling them out a bit helps. Or he can get out the dremel and do some grindage where they are slapping. Quote Link to comment Share on other sites More sharing options...
FireHead Posted July 24, 2009 Report Share Posted July 24, 2009 mine made it about 100hrs now and have minimal freying on the corners.....time to replace though. Carbon fiber reeds suck! Sounds like they are slapping the reed box to me... That is one of the reasons why I use reedspacers, but I cut them down to .250 on the mill. No need for a full .500. Just pulling them out a bit helps. Or he can get out the dremel and do some grindage where they are slapping. I doubt you can here reeds hitting anything. Furthermore, I don't think your reed spacers are helping anything either (certainly they change the responsiveness and frequency of the petals). If you don't like CF reeds what do you prefer? Properly made CF reeds are far more robust and and are a much higher performance (from a material standpoint), than pretty much any other type of commercially available material. :geek: Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted July 24, 2009 Report Share Posted July 24, 2009 Refresh my memory: What is the OEM application for the reed cages the T-Rex cylinders use? Isn't it a blaster? Quote Link to comment Share on other sites More sharing options...
FireHead Posted July 24, 2009 Report Share Posted July 24, 2009 Isn't it a blaster? I can't remember........... It could be a three horned, purple people eater for all I know. I am pretty sure there is a VF3 application that covers it. :geek: Quote Link to comment Share on other sites More sharing options...
4stroker Posted October 11, 2009 Author Report Share Posted October 11, 2009 ok people we are still having this problem, and cannot figure out why!! my buddy put brand new petals in 4 meets ago and used loctite on the screws. on the weekend the bike ran hard all day for 3 heats and then in the 4th it took a shit halfway through and lost alot of power... back to the pits and pull the reeds out and yep sure enough all reeds are split up the middle of the petal, screws were tight and everything else looked good. it had new gaskets and even brand new intakes and all mating surfaces are flat, so it had no air leaks or anything weird like that. someone must know something or must have seen this before... what is the reason for a two stroke being hard on reeds?? for example: hole in piston/pitting on head = detonation rings nip up in bore/spark plug is white & dry = engine is lean engine is chewing through reeds = ??? thanks, mark Quote Link to comment Share on other sites More sharing options...
Sammy Posted October 11, 2009 Report Share Posted October 11, 2009 How about swapping to a chariot billet reed cage with their reeds. Supposed to be proven better than VF3's Quote Link to comment Share on other sites More sharing options...
White97Banshee Posted October 12, 2009 Report Share Posted October 12, 2009 That happened to me once on the right side one of the reed petals got sucked into the motor and I associated it with an intake leak caused by the crappy boost bottle that came with the bike ripping the intake boot. Everything happened at once and the piston skirt took a dump in the crank case causing the crank to seize on a huge piece of piston. But I replaced everything and have put many hours on the new petals and everything is so far so good. Are your screws maybe too tight? Quote Link to comment Share on other sites More sharing options...
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