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DT125R Forum -> Projects -> PICTURE HEAVY ....D.I.Y Wheel build ,Ali rims from a crosser(unsprung/weight/ acceleration/spokes)
Post Info TOPIC: PICTURE HEAVY ....D.I.Y Wheel build ,Ali rims from a crosser(unsprung/weight/ acceleration/spokes)
GADGET


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PICTURE HEAVY ....D.I.Y Wheel build ,Ali rims from a crosser(unsprung/weight/ acceleration/spokes)
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Exactly nev ,thought I'd put it up to stop others ruining there Ali parts with too much heat ,could be proppa dangerous aswell ,SO anyone having rims/hubs etc powdercoated make sure to ask what temp they will be baking them at,I think it's about 400c that affects it but some powdercoaters don't know about this but they should ?...oh and Ali won't glow red it just melts without warning

-- Edited by GADGET on Wednesday 18th of July 2012 03:30:10 PM

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GADGET


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You won't have any spokes to measure, if your lucky with it tho the ones from the sumo rim might just fit but mind your angles ,if someone can measure the inside diameter of their sm ,then if you average out th size difference of yours you will end up with the perfect size needed,hope this helps dude

-- Edited by GADGET on Wednesday 18th of July 2012 04:49:21 PM

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CarlosRexx


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I can look about, but I don't think I'll beat 90+ a wheel. My brother has them and he rides his bike like it's a ****ing trials bike, up and down ****, all over ****. Crazy fool. His seem to have held up. I'll look around :)

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GADGET


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Cheers Calum,yeah it's gettin there but I can't wait for the best bits,I gotta get these bolts out do some measurements and cut the spokes off ,and this bits takin ages

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GADGET


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Yeah dude ,will save people going over it again and again lol ,definatly up for that ,as I get this one done I will get any missing info/photos together and make it a bit more user friendly

-- Edited by GADGET on Wednesday 18th of July 2012 06:38:56 PM

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NEV


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Nice one Gadge.

Plus if anyone has a knackered late re/x loom they don't want, I can strip that right back and re-map it for a more comprehensive guide, same as the DTR one I did before.



-- Edited by NEV on Wednesday 18th of July 2012 06:53:19 PM

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GADGET


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Oh oh oh ,one that lots of people have asked me about is the swinger bearings and bushes ,I don't know why but a lot of peeps find it daunting!,,yup deffo do the loom diagram for the later ones if poss ,any chance you could reformat the dtr one as its pretty hard to see

-- Edited by GADGET on Wednesday 18th of July 2012 07:02:16 PM

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GADGET


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I'm gonna do all the measuring for the rear rim tonight so will keep all the specs and add it to the thread so people don't have to measure front or rear ,this way it'll just be remove tyres/brakes/sprockets then cut spokes out and lace new ones in (this will only work for relacing tho and not custom builds) but anyone can msg me if they need me to work out the custom stuff for them , Carlos man if you give me any measurements you've got I'll work out the shizz coz those places that do the rebuilds are gonna sting yer and I'll buy buckled/duff wheels and replace/true them like new and sell on here ,loads of mot failures are wheel related

-- Edited by GADGET on Wednesday 18th of July 2012 07:20:21 PM

-- Edited by GADGET on Wednesday 18th of July 2012 07:41:55 PM

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the only way is YAMAHA DTR


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drill them out, FFS yamaha an thier sh1t bolts, and the crankcase bolts

button cap bolt always round off , and usually got to much thread lock on them

i drilled mine out and put nuts on the back



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GADGET


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Tried this......no chance

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GADGET


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Then found "ol faithful grips" these things have got me outta sooooo many probs and have done it again ,some heat again but with these grips and walah ......the threads in the photo look fuzzed up but are perfect ,...... yeeeeeeeeeeeeeeeeeeeaaaaaaahhhhhh baby ... Look at the second nipple down in this pic as you can see in the pics I got all the bolts out without even a snif of thread damage but I think I might have to run a tap thru them just to get the rest of the threadlock outta them ,,,also the tyre is of I hate doing tyres ,,yet again it's scary how bad the spoke nipples get and they don't even look as bad in the photos,gotta measur it all up today and then th fun really starts

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NEV


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When I had problems with the sprocket bolts seized up on the hub, and found that someone had used blue loctite on them, got a plumbers blowtorch on to them, and gently heated each bolt, you can see the loctite bubbling , then undo.

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GADGET


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Yeah man I used a heat gun on it but was worried coz after a certain heat Ali becomes really weak and many items have been completely ruined by powdercoaters baking them too high when curing th powder

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NEV


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Nah dont let it concentrate the heat onto the bolt, more like wafting it back and forth. 20-30 seconds of doing that and it was out.

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GADGET


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Oh good man they can be right biaches,just got this from wiki ,thought I should put it up as we've been advising the heat method but this shows people they do need to be very careful,you can do unseen damage to Ali with heat and make it really weak ...."The strength and durability of aluminium alloys vary widely, not only as a result of the components of the specific alloy, but also as a result of heat treatments and manufacturing processes. A lack of knowledge of these aspects has from time to time led to improperly designed structures and gained aluminium a bad reputation. One important structural limitation of aluminium alloys is their fatigue strength. Unlike steels, aluminium alloys have no well-defined fatigue limit, meaning that fatigue failure eventually occurs, under even very small cyclic loadings. This implies that engineers must assess these loads and design for a fixed life rather than an infinite life. Another important property of aluminium alloys is their sensitivity to heat. Workshop procedures involving heating are complicated by the fact that aluminium, unlike steel, melts without first glowing red. Forming operations where a blow torch is used therefore require some expertise, since no visual signs reveal how close the material is to melting. Aluminium alloys, like all structural alloys, also are subject to internal stresses following heating operations such as welding and casting. The problem with aluminium alloys in this regard is their low melting point, which make them more susceptible to distortions from thermally induced stress relief. Controlled stress relief can be done during manufacturing by heat-treating the parts in an oven, followed by gradual coolingin effect annealing the stresses."

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NEV


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Nooooo nooooo nooo, never let it get red or owt, it basically tempers it, making it brittle, just a gentle sweep with the heat, like I say soon as you see the loctite bubbling heat off then whip the bolt out

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CarlosRexx


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Gadget, I got my wheels ;)

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GADGET


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Yeah mate cool ,get a pic up dude !what did you get them off in the end ???

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CarlosRexx


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My brothers bike, I don't trust the hubs but it's a good job cos I'm stealing the rim and lacing it to my DT hubs!

tumblr_m7d4mn80pa1r5807eo1_500.jpg

What size should the front be? cos that looks meggaaaa tiny. 17inch



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GADGET


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Yeah man 17s for sumo ,have you got both ? Did u count th spokes

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CarlosRexx


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Ah right. Nah not yet, it started pissing down and I don't like rain so I still have to get the bakc wheel off and then sort the spokes out, I need length and stuff don't i?

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GADGET


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Yep you gotta make sure the rims have 36 spokes, as you are going smaller you may have to change the angles of the holes in the rims as it will be a sharper pitch from the longer ones

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CarlosRexx


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Yeah, I'm gonna measure the spokes and send the dimensions etc to a shop that do wheelbuilding. I'll tell them the rims dimension, the offset, the spoke length and bend and the spokes I want :D

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CarlosRexx


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The bikes from 2009, so I'm hoping the spokes are reusable? if that's even possible?

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GADGET


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It's possible if you can unscrew them,being newer is deffo gonna help but if they are thicker than dtr ones they might not fit thru th hubs

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CarlosRexx


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My insurance runs out tomorrow and I don't have the money to renew it so I'll be taking the bike off the road for a while. I'll sort it all then.

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GADGET


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Yeah man at least you won't lose riding time if you do it when ur off the road already I'm sure we can sort it

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CarlosRexx


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ha don't worry, I'll be getting you on speed dial for some tips ;) that stuff Nev posted was wheel lacing gold too. I'll be printing that off :D


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GADGET


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No probs ,and nev done so well , oh yeah nev are we gonna sticky this still for others

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NEV


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Yup will do now

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