OzVMX Forum
Marque Remarks => Maico => Topic started by: 2 shocks on May 24, 2009, 02:36:26 pm
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Does anyone have any information about adapting Yamaha front drum brake to a 81 490 ???
Mr Maico #54
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G'day Mr Maico,
hope all is well. this topic came up some time back on the forum, and if i remember correctly Firko had some info, perhaps a PM to him will help you.
Regards
Hoony
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i bought this bike ages ago and traded some off it to dave mac (includeing the reed barrell) hind sight is a wonderfull thing ::)
im not sure if it had a yamaha or ktm front wheel but it also had a square alloy lug welded up the inside of the fork to hold the backing plate in place .the wheel seemed to fit in there nicely
(http://i382.photobucket.com/albums/oo263/ozmaico/PICT0059.jpg)
(http://i382.photobucket.com/albums/oo263/ozmaico/Picture041.jpg)
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I replaced a complete front end with a yamaha unit, but had to have triple clamps reamed out 1/2 mm to allow 43mm forks.
Pauls way looks cheaper and easier.....you just have to work out how to do it ;)
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I did the same and fitted the yamaha forks and wheel by machining out the triple clamps. Was very easy but i'd probably have preferred to keep the maico forks if i did it again.
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i thought maicos were good
do they have a shite front brake ;D ;D ::)
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i thought maicos were good
do they have a shite front brake ;D ;D ::)
Only to even things up a little cos they are so much better than the rest of the field.
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YZ465 TLS from '80 or '81 will do the trick but a slightly complex looking plate has to be fabricated with a lug to engage the brake plate and extend up the fork leg to be secured by he usual front brake stay mounting lug. Not too hard at all.
The front end I got from Paul included a lug welded to the LH slider a la most Jap bikes to mate up with the KTM? (from memory) TLS - all very neat and destined for a bike I want to build for my young bloke but he will have to settle for the superb? Maico stopper first (he figures cornering speed will be sensational, lol!
Les Richters can also supply on exchange brake shoes lined with some sort of fiction material usually reserved for the brakes on roller-coasters or some such thing.
Boring out the triples is no big deal if required just a bit of a fiddle required although the amount removed from the bores will be on my measurement be 1.3mm as the Maico staunchions are 41.7mm.
In the next week or so I'll try and remember to dig out the bits of both the 465 option along with the other I mentioned and make more sense of it plus take some pics.
Work in progress
Dave Mac
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Dave did welding a lug on the lower fork leg distort the leg in any way? Does the fork staunchion still slide in and out freely? I've often wondered if this is the best way for the yamaha wheel conversion opposed to making a bracket with a lug attatched to it like they did back then.
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Johnny O - I'll check it all out and report back but from memory all seemed pretty good but care and a good welder would have to be applied that's for sure !
Dave Mac
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Dave,
The clamps only require a bit over 1/2 a mill taken out to get the required 43mm dia.
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Yeah .65mm on either side or 1.3 in total. You can hardly notice the difference once it's done.
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what sort of front rim is that on those photos Paul?
Here is a KTM plate
(http://fhq7hw.blu.livefilestore.com/y1pRocn295GBVyNJpsYBc71C_GZ0q2QUbAWq_6tk-VOXh3_Q8UqSy4KKqtnjUgzSd3bvdrDq7Uxpb7Mm_59obF9AA/KTM.jpg)
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Hey i reckon your spot on there Leith it looks to say the same on Pauls plate :)
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That ktm backing plate looks like it has 2 locating slots for the lug on the fork leg. It does look the same as the one on pauls bike.
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Yep Leith, you're bang on with the backing plate and the slot used is nearest to the hole for the cam spindle (strange having two slots in the plate?)
The slot is 15.8mm wide and curiously the lug welded on the slider is only 12.4mm (1/2" in the old speak so maybe it was a convenient off cut) I suspect there may be a slight amount of clearance there but who knows - when mounted the lug and the slot may be mis-aligned so there is less play.
The slider must have been welded well enough as there is no binding on the staunchion and although it isn't the neatest welding around it is quite OK.
The 1.3mm that has to be bored out of the triples, while it may work does leave them a bit on the lean side but I will defer to the experts here. For my money I would adapt the brakes rather than the forks just to be on the safe side though so long as a good welder is available and keeps the front end mostly Maico.
Hope this helps
Dave Mac :D
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I made an adapter to fit a Yamaha front brake to a Maico about 30 years ago and still use a more refined version of it today when I switch to my 19" Yamaha hubbed dirt track front wheel. If you PM me with your contact details Mr Maico I can send you a template or..I'll bring it to CD6 and you can have a squiz at it. It fits the slot in the early MX/YZ conical hub backing plate...dunno about later applications.
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I dug out the offending fork leg as seen in the pics Paul posted and had a fiddle on the bench with it along with the KTM backing plate and all looked good. I then went a step further and offered up a 465 G TLS backing plate and that looked even better.
What I intend doing in the next week or so is stop over at my friendly neighbourhood welder and get his take on the best way to weld on a lug on a spare leg without risking damage. Perhaps a length of solid bar inside say .025mm less in diameter to hold the distortion to a minimum?
Work in progress
Dave Mac
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Im the sacked factory rider and i didnt have any problems with the front brake on the 490 .
Actually i thougth it was twice as good as the 79 490
Can i have my ride back
Maico stu
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GET OVER IT MAICOSTUE U HAD YOUR CHANCE ITS TIME TO WEAR BIG BOY PANTS FACTORY RIDERS SHOULD NOT BE OLD AND BALD. REGARDS DREW
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HE WHO LAUGHS LAST LAUGHS BESTS RIGHT STU
classic 26 I BELIEVE THAT YOU HAVENT GOT MUCH GRASS ON YOUR RUN WAY EITHER LOL
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there must be boxes of maico front brakes out there ;D
spose you cant sell on ebay no one would want them ;D ;D ;)
we should start a new post
other uses for maico front brakes ::) ;D
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SEND EM HERE RUSTY ,I'LL TAKE ANY MAICO PART YOU COME UP WITH
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Im the sacked factory rider and i didnt have any problems with the front brake on the 490 .
Actually i thougth it was twice as good as the 79 490
Can i have my ride back
Maico stu
the problem was stu, u just held the throttle wide open and threw gears at it like bob hannah, u wouldnt have noticed the brake if u didn't use it... i used other bikes to keep me on the track.. :D
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we should start a new post
other uses for maico front brakes ::) ;D
Helmets for Germans for when they go to the next World War?
Retro ashtrays?
Young girls could put them down their bras to get the "Maico Girl" look?
Pretty poor frizzbies?
Emergency house roofing?......
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MONTESA TOW HITCH ::)
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Sneak into your mates garage on a Saturday night. Cleverly graft the Maico front brake to his bike whilst he sleeps. The next day, position yourself with camera at the end of the start straight. Take photo of said friend sailing through berm/fence/spectators and send to local paper to make the second page. ;)
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rear brakes for yamahas ;D
ride on mower brakes 8)
tell yz465 riders they are great and swap for
there shitty old twin leader
tell them they are off $10,000 bike
and they have got a good deal :o
fix them in vice with axle to make
a wheel truing machine ::)
sell them to maico owners who have yz brakes
do the swap and tell them genuine is the way to go
to make bike worth more just tell you have a mate with
a yz who wants one then sneak home and fit it to your 490 ;D ;D ;D
give me some time i will think of some more ;)
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:D :D Pissa! ;D
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here we go again!next the good old boys(GOBS) will be on to it ,slagging off from the safety off the computers or via emails and the party will be in full swing (again)
btw all my maico brakes are fine thanks for asking
email me direct if for either abuse or death threats .at [email protected]
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btw whats going on here
http://cgi.ebay.com/ebaymotors/2008-Maico-700-Motard_W0QQitemZ200347440360QQcmdZViewItemQQptZUS_motorcycles?hash=item2ea5a354e8&_trksid=p4506.c0.m245&_trkparms=72%3A317%7C65%3A12%7C39%3A1%7C240%3A1318
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Well spotted Paul! Very interesting looking bike but I'll stick with the old ones with the dodgy brakes thanks very much, lol!
As for the brakes given I am slow as a cold winters afternoon (much like the shitty one we have here today) I was surprised that mine actually seemed to work OK. Les has some good friction material which apparently does an amazing transformation anyway.
GOB's can go their hardest on ANY topic - put me down for a death threat ,lol
Good point re corner speed Mick
Dave Mac :D
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here we go again!next the good old boys(GOBS) will be on to it ,slagging off from the safety off the computers or via emails and the party will be in full swing (again)
btw all my maico brakes are fine thanks for asking
email me direct if for either abuse or death threats
Paul..Move on and stop trying to cause shit.
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Good point re corner speed Mick
Dave Mac :D
Cornered a few Monties at speed have you Dave? Oh yeah. You owned one for.........a week wasn't it? ::)
LOL
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no shit from me. but why do people have to bung shit on others choices in bikes that all ,AGAIN
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Feel the Love boy's ::)
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I'm shutting up now as I pledged that I wouldn't get embroiled in any crap until Graeme got back from CD6. Then it's back to business..... ;)
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Actually you're right mate. Monties are the biggest heap of shit known to man. How can I argue with a man of your credentials? So if you do happen across one of these hapless bikes and you need to rid the planet of it to make way for yet another Mega2 (were there that many of them around back then anyhow? ???) then give 'ol Uncle Rossy a call and he'll come and take it away for you. As a community service.
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your too touchy paul :D
i actually like all bikes
not bunging shit on maicos
just having fun with the front brakes :D
at least we are still talking about vmx bikes
not like some other shitty posts
that go on forever and dont even mention old bikes ;D
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Jeez I need a therapist, got Maicos and a Montesa, one wont go and one wont stop ::) ;D
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mick you been drinking turps again
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jesus now i have to tidy up . is that the main bedroom lol .
remember what happpened last time
(http://i382.photobucket.com/albums/oo263/ozmaico/6a00d83451e1dc69e2010536c8fe25970c-.jpg)
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Mick - you need help!
That store room looks way too tidy and uncluttered.
As for the poor unwanted Monty - yeah it was short lived but had I known what was ahead of me (that the seller felt I didn't need to know) I wouldn't have bought the thing. Nathan on the other hand is a glutton for punishment but something tells me her will surprise us all and do a good job on the old VR
As for Ross - you just look after those two 'bell ringer' lumps on your shoulders !!! At least I only have one lump and that's annoying when me singlet keeps trying to slide off !!!
Enjoy work guys it's back tomorrow - even for bludging fireys !!!
Dave Mac :D
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I think Dave is referring to me in jest Ross ;)
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Sorry. :D
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Hey Mick! Be nicer to Montesa riding truck drivers bearing gifts (like Maico frames) ok? :D
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Just had word that x factory rider maicostue is back on the victorian factory maico team with his hard charging and late braking and his insight in the runnings of the maico workings Stue should be able to fix any front brake problems looking forward to seeing him race at monza in two weeks time. DREW
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wont be going any were if he dont pick this bit up
(http://i382.photobucket.com/albums/oo263/ozmaico/IMGP2763.jpg)
and stay away from the drill
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Okay Paul l,m going to bite what did he do with drill ? DREW
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drew i carnt say .ive all ready said tooo much
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drew i carnt say .ive all ready said tooo much
It wouldn't have anything to do with looking kewl, saving weight or stress fractures followed, by compound fractures would it? ;D
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not as yet ::)
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Jezez. Not a bad crop of Salmonella growing on your key-board and mouse there fella....... :P
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Thought about a CZ brake? If a CZ drum doesn't give you enough stopping power, then your next stop is a disc.