bansheesandrider Posted October 9, 2009 Report Share Posted October 9, 2009 Has anybody tried the Trinity shift drum mod where they machine the shift drum and add a bearing to the end that normally just spins in the case? Does it help with the shifting? Is there anybody else that does this mod? Or does anybody know the number for the bearing and the dimension that the drum is machined to? Quote Link to comment Share on other sites More sharing options...
Thewhite Posted October 9, 2009 Report Share Posted October 9, 2009 Has anybody tried the Trinity shift drum mod where they machine the shift drum and add a bearing to the end that normally just spins in the case? Does it help with the shifting? Is there anybody else that does this mod? Or does anybody know the number for the bearing and the dimension that the drum is machined to? Don't spend 150$ on that drum: WCR will be able to install a bearing for only 30$!! I also suggest to spend the remaining money on a set on RZ350 shift fork and shift drum, the pin on the fork are a roller instead of a pin. I haven't reassemble the engine yet, but got all my parts including the modded shift shaft, the new bilet shift star from MullenEng. Quote Link to comment Share on other sites More sharing options...
bansheesandrider Posted October 9, 2009 Author Report Share Posted October 9, 2009 Don't spend 150$ on that drum: WCR will be able to install a bearing for only 30$!! I also suggest to spend the remaining money on a set on RZ350 shift fork and shift drum, the pin on the fork are a roller instead of a pin. I haven't reassemble the engine yet, but got all my parts including the modded shift shaft, the new bilet shift star from MullenEng. Is that 30 bucks for parts and labor? Who is WCR? I am building a motor from scratch so I will have to buy a shift drum also. Are those RZ forks new, because the last time I checked with Yamaha they were selling Banshee forks for RZs? Are you using a Banshee drun or a RZ drum with the RZ forks? Quote Link to comment Share on other sites More sharing options...
Thewhite Posted October 11, 2009 Report Share Posted October 11, 2009 (edited) Is that 30 bucks for parts and labor? Who is WCR? I am building a motor from scratch so I will have to buy a shift drum also. Are those RZ forks new, because the last time I checked with Yamaha they were selling Banshee forks for RZs? Are you using a Banshee drun or a RZ drum with the RZ forks? only 30$ for bearing, machinning and labor ... just add the shipping. WCR (whitaker custom racing)is in Florida and he building alot of dunable tranny. Check on google for the complete name and you will find it, he done mine and very well done. The RZ350 fork are not the same, your dealer haven't check the part number. Find a par number finder on the net and check for a 1984 RZ350. I suggest you to go to another dealer. The RZ and the banshee shift drum are very similar: all the same except a bigger angle (chanfer) on the side of the groove. Not sure if the groove differ (I already sold my off stuff). Can you make me a favor: can you mesure the exhaust oulet outisde diameter of the cylinder, where the pipe fit (with a caliper if possible). Edited October 11, 2009 by Thewhite Quote Link to comment Share on other sites More sharing options...
bansheesandrider Posted October 11, 2009 Author Report Share Posted October 11, 2009 only 30$ for bearing, machinning and labor ... just add the shipping. WCR (whitaker custom racing)is in Florida and he building alot of dunable tranny. Check on google for the complete name and you will find it, he done mine and very well done. The RZ350 fork are not the same, your dealer haven't check the part number. Find a par number finder on the net and check for a 1984 RZ350. I suggest you to go to another dealer. The RZ and the banshee shift drum are very similar: all the same except a bigger angle (chanfer) on the side of the groove. Not sure if the groove differ (I already sold my off stuff). Can you make me a favor: can you mesure the exhaust oulet outisde diameter of the cylinder, where the pipe fit (with a caliper if possible). I don't have a cyl. to measure at this time. I looked up the shift forks online and every thing shows part number 2GU-18511-00-00 for shift fork #1 which you need two of, this is for both the Banshee ans the RZ. For shift fok #2 which you need one of they show 4LO-18512-00-00 for the RZ and 2GU-18512-00-00 for the Banshee. I have been looking forever for Genuine RZ shift foks. Thanks for the other info. Quote Link to comment Share on other sites More sharing options...
VegasJeff Posted October 11, 2009 Report Share Posted October 11, 2009 Has anybody tried the Trinity shift drum mod where they machine the shift drum and add a bearing to the end that normally just spins in the case? Does it help with the shifting? Is there anybody else that does this mod? Or does anybody know the number for the bearing and the dimension that the drum is machined to? I ran the trinity shift drum for a few years and it was a considerable difference in shifting.It was a little priceyand I could of saved cash by sending it somewhere for the mod,but one stop shop was my decision. I just sold two of them last week. Jeff Quote Link to comment Share on other sites More sharing options...
bansheesandrider Posted October 11, 2009 Author Report Share Posted October 11, 2009 I ran the trinity shift drum for a few years and it was a considerable difference in shifting.It was a little pricey and I could of saved cash by sending it somewhere for the mod,but one stop shop was my decision. I just sold two of them last week. Jeff I don't know if it is that expensive, when I checked, they wanted 130 which I assume is outright witha new drum from them. The best deal I could find on a new drum was 90 plus shipping and then I would need the mod done, so 130 doesn't seem bad. Quote Link to comment Share on other sites More sharing options...
Boosted GMC Posted October 11, 2009 Report Share Posted October 11, 2009 The number for the bearing is 6902RS you can get 2 for $6.95 on ebay with free shipping. I bought one of the drums from vegas jeff and the bearing was a little rough. I plan to replace the bearing before installation. Quote Link to comment Share on other sites More sharing options...
bbcmudtruck Posted October 11, 2009 Report Share Posted October 11, 2009 Good lookin out! I'm going to send them my spare drum tomorrow. Here is the website: http://www.w-c-r.com/PRICING.htm Quote Link to comment Share on other sites More sharing options...
bansheesandrider Posted October 16, 2009 Author Report Share Posted October 16, 2009 (edited) $130 for the Trinity shift drum does not seem bad cosidering what Yamaha wants for a new one and then having to modify it and ship it. Everybody that has used it seems to like it except for the price. Does anybody know where I can get genuine RZ shift forks (with the roller) in good shape, as the ones I look up online are the same part numbers as a Banshee? Or does anybody have the part number for the original RZ forks with the roller so I could search for some old stock? Edited October 16, 2009 by bansheesandrider Quote Link to comment Share on other sites More sharing options...
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