n2otoofast4u Posted March 2, 2016 Report Posted March 2, 2016 JT be building shit that makes you go faster. Dat other guy............. gas caps. 1 Quote
registered user Posted March 2, 2016 Report Posted March 2, 2016 No friggin Way an aluminum drum doesn't end up in catastrophe. is that so. if I didn't know any better I would swear these are aluminum. http://www.ebay.com/itm/KTM-Shift-Drum-Forks-01-520SX-/150781738094http://www.ebay.com/itm/KTM-Shift-Drum-250-300-360-380-XC-EXC-SX-MXC-SXS-transmission-shifting-300MXC-/301864637777?hash=item464888d551:g:RjUAAOSwu4BV7Gz7&vxp=mtr most wouldn't notice but the fork nipple has a sleeve so it can roll through the chanell. substantially eliminating most all the wear on the chanell sides I would imagine. banging gears all day on a mx track couldn't be any easier on a drum than what any of us do. my opinion of the stock drum is simple. it looks like a low grade cast steel of some sort from what I could tell. probly doesn't even weld worth a crap unfortunately far to many people immediately disregard a idea before theyve investigated the matter claude the 7075 material for a drum is peanuts. if you have the time and machines then you have nothing to lose Quote
trickedcarbine Posted March 2, 2016 Report Posted March 2, 2016 (edited) is that so. if I didn't know any better I would swear these are aluminum. http://www.ebay.com/itm/KTM-Shift-Drum-Forks-01-520SX-/150781738094http://www.ebay.com/itm/KTM-Shift-Drum-250-300-360-380-XC-EXC-SX-MXC-SXS-transmission-shifting-300MXC-/301864637777?hash=item464888d551:g:RjUAAOSwu4BV7Gz7&vxp=mtr most wouldn't notice but the fork nipple has a sleeve so it can roll through the chanell. substantially eliminating most all the wear on the chanell sides I would imagine. banging gears all day on a mx track couldn't be any easier on a drum than what any of us do. my opinion of the stock drum is simple. it looks like a low grade cast steel of some sort from what I could tell. probly doesn't even weld worth a crap unfortunately far to many people immediately disregard a idea before theyve investigated the matter claude the 7075 material for a drum is peanuts. if you have the time and machines then you have nothing to lose Interesting.... You don't think tripling the power would have any affect? Also, is anybody hard anodizing them? Edited March 2, 2016 by trickedcarbine Quote
registered user Posted March 2, 2016 Report Posted March 2, 2016 with a override I don't think it would matter if you had 10000hp. on a standard trans, trying to shift under full power with no clutch, something is going to wear sooner than later. my guess would be the forks or fork shafts would take the brundt of abuse Quote
JTmachining Posted March 2, 2016 Author Report Posted March 2, 2016 All this talk about machining aluminum parts to have lighter options, but do any of you know how much the OEM shift drum weighs? Its cast heat treated and hollow. Very strong and light. There's also other things that can be done to the trans to improve things besides machining 3 Quote
registered user Posted March 2, 2016 Report Posted March 2, 2016 the plastic star isn't even a bad idea imo, except that its keyed to the drum. seems like it may develop slop a bit easier than aluminum or steel Quote
n2otoofast4u Posted March 2, 2016 Report Posted March 2, 2016 All this talk about machining aluminum parts to have lighter options, but do any of you know how much the OEM shift drum weighs? Its cast heat treated and hollow. Very strong and light. There's also other things that can be done to the trans to improve things besides machiningSomeone gets it! Quote
registered user Posted March 2, 2016 Report Posted March 2, 2016 I must confess I thought the stock drum felt alittle heavy that's why I brought it up. maybe a aluminum drum would or wouldn't work out but its been done before so it probly isn't the worlds worst idea. like anything I guess a lot would depend on how much thought went into the design Quote
n2otoofast4u Posted March 2, 2016 Report Posted March 2, 2016 I must confess I thought the stock drum felt alittle heavy that's why I brought it up. maybe a aluminum drum would or wouldn't work out but its been done before so it probly isn't the worlds worst idea. like anything I guess a lot would depend on how much thought went into the designMaybe spend some time with the OEM drum rather than reinvent the wheel? There's places to loose weight inside the cases. Just sayin. Quote
locogato11283 Posted March 2, 2016 Report Posted March 2, 2016 Neutral down 2-5 will free up a lot of weight and its proven to work. No need to possibly trash a transmission over it. Quote
registered user Posted March 2, 2016 Report Posted March 2, 2016 Maybe spend some time with the OEM drum rather than reinvent the wheel? There's places to loose weight inside the cases. Just sayin. heres what im saying. why use a big ass fuel cap like a lot of people when you can use a small 1"-1-1/2" and machine out the center. why lug around 2gal fuel when you can cut it in half with 1gal. how dare we reinvent the wheel Quote
JTmachining Posted March 2, 2016 Author Report Posted March 2, 2016 Weight and friction are things to pay attention to. There are so many details that go into a fast drag bike. I'm an all or nothing attitude...starting with simple nuts and bolts...if you want light weight and don't have all TI and aluminum hardware you are half stepping things 1 Quote
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