OzVMX Forum
Marque Remarks => Honda => Topic started by: Oldrodder on January 29, 2008, 11:05:54 pm
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I am trying to get my CR250 and my minibike ready for CD5
Here is some pics of the minibike (That's what the compliance plate says anyway)
(http://img352.imageshack.us/img352/5999/p1280334pj5.jpg)
(http://img201.imageshack.us/img201/8346/p1280337xd9.jpg)
some pics of the CR soon
(http://i219.photobucket.com/albums/cc29/ausrod34/Compliance-1.jpg)
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Um, thats got too many wheels to be a bike!
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Looking good. :) minitrike. tripower ;)
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Mini bike my arse those things are a death adder!! but cool resto go the red!!
Looks like your a big fan of the multi wheel version of VMX?
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We love the sand dunes at Stockton, for how long we get to use them now they have been handed over to Worimi and controlled by NPWS is the unknown factor.
We have an '86 200x an '85 350x and the '83 250R thats having a resto.
I also currently have a '78 CR250 about half way through resto
I would love an XR 350 to resto next but will see how I go with the almighty dollar, what with interest rates going up that leaves less for spending on toys.
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See you are a fan of the red thats cool, have 2 79 CR'S myself. In the early 80's the trike thing was pretty big in Bris so there would be a few around Im sure up here.
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Some more progress on the minibike
(http://i219.photobucket.com/albums/cc29/ausrod34/Mini-Bike-progress.jpg)
http://au.youtube.com/watch?v=LUNSYVZD5Ow
Motor runs but needs jetting, waiting on a heap of items from powder coater.
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Looking sharp. Nice prgress. You wont be hard to spot at CD5 mate. ;D
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sharp? - it looks fantastic! well done mate. nothing like new OEM stuff (and aftermarket) to make you feel like its 19whatever again.
never ridden one of them, but with a cr250 donk in there, bound to rip.
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Here is a new pic of the restored minibike, unfortunately the new tyres for the gold rims that should be on it are not here as yet, so it is currently on a set of rims from the 200cc trike that we have
(http://i219.photobucket.com/albums/cc29/ausrod34/250r-silverwheels-1.jpg)
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(http://i219.photobucket.com/albums/cc29/ausrod34/Compliance-1.jpg)
Mini bike ???; GVWR 470lb. :o ::) ;D
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She looks fantastic rodder. Top job..
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yeah looks great oldrodder, a mate of mine had 1 of these units about 15-20 year ago and we had a fat time on it! Takes a little (a lot!) getting used to and infact I found it harder to ride 'safely' than the ex Bill Sewell GS1000S speedway sidecar we also played with. Wish I still had my old FL250 0ddessy but I doubt the roll cage would fit in the van ::) seems like everyone who drove it crashed it :o 'cept me..obviously I never drove it hard enough :D only dislike of the FL and the ATC's was a lack of reverse gear :P I'll be keeping an optic out for it at CD5 :)
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There was one of those "mini bikes" on ebay the other day fitted with a cr480 motor......
I carumbah!!!!!!
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Mini Bike finished now onto the big bike??
(http://i219.photobucket.com/albums/cc29/ausrod34/ATC-250R-Finished-2.jpg)
(http://i219.photobucket.com/albums/cc29/ausrod34/1978-CR250R-1.jpg)
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I am having trouble with tuning the Minibike and hope somone has a few ideas.
It is a '83 ATC 250R with stock bore.
Fitted with DG pipe and silencer and larger 34mm keihin carby.
The carby was leaking and it seemed to be fueling up and a bit doughy.
Took carby off and reset float level it then went like it should (pulled front wheel of ground in 1st and 2nd) but ran out of fuel and stopped.
Any suggestions or tips on how to get float level correct or how high fuel level should be in bowl, it's been 20 or so years since I have had a 2 stroke so any help would be great.
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oldrodder, did it go well before with the 34mm carby on it or only since you put it on? if the latter, easy to guess that unless something like float bowl too high/low or one or all of the jets too big/small, that the machine just don't function properly with the bigger carby on it. i guess you won't know until you change a few jets and see it improves performance. so might have to buy yourself a few main jets, pilot jets, needles maybe and experiment. as for float height, i reckon set to similar height for the 32mm carb. take float bowl off, turn upside down, and measure (usually) from top edge of the carby body to the tang (that right guys? can't remember myself....). or just go back to the 32mm, and give her a bigger main jet for the dg pipe? its often said that a bigger carby can just reduce performance, due to less air speed thru the bigger venturi chamber and into the cylinder. less airspeed, less charge goes in.
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I have gone back to 30mm Keihin and will check jetting next time it is ridden, currently starts easy and when warmed revs crisp.
On a quick test run pulled the front wheel off the ground when the power band cut in in first and second gears.
Looks like going to a bigger carb is not necessarily the way to go, as I found out.
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We went to mates property on weekend and gave it a run, dropping back to that smaller carby done the trick, checked the plug and appears to running fine.
Here is a pic that ATV Australia magazine took of the finished product, It's marvellous what a difference an expensive camera makes.
(http://i219.photobucket.com/albums/cc29/ausrod34/GlensR.jpg)
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Hell of a nice job rodder. A credit to you. Well done.