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Procrastinator
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1,057 Posts
Discussion Starter #1
In a bit to get some cheap track riding fitted in to my schedule, I picked up this recently.
I'll be getting replacement plastic to fit instead of the bust stuff that was on it before, and going through it from front to back replacing any crap fasteners and dodgy maintenance that it had in a former life.
I've already enrolled in a race series for this year, just need to pull my finger out and get my van sorted ready for the start of race season...
 

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hooligan quads
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1,715 Posts
I was hoping to do the same this year but i haven't even started yet lol


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hooligan quads
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Get it done Titan - you know there's rounds of the British Mini Bike championship at Llandow and Pembrey don't ya?... :)
Llandow is 2-3miles from my house, up there alot watching on a weekend while enjoying a bacon butty lol... Need to get on it

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Procrastinator
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Discussion Starter #6
Starting by modifying the handguards so that they fit properly by drilling an extra mounting hole. I'll then shorten them to suit, and the other one needs a mounting block making as it'd been bodged with a dodgy fastener. I'll make a new one from a chunk of ally.
 

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Eff Tee Pee
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Looks like that motors got my seal of approval on it MDM! Nice sticker lol Cheers good to go!
 
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Member
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bit of blue glue? great to see a good amount of people getting their build on, doing their own fab and welding etc

except Seb, he still on another level :D showing the rest of us up
 

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Procrastinator
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Discussion Starter #10
Most of the Kart tracks that allow bikes, and the race series in which I'm hoping to have a play, demand that sliders are fitted to footpegs to prevent track damage, so I fitted some, although they meant having to cut some material out from the pegs and grinding down a couple of the teeth too. Ten minute job, and another thing out of the way.
 

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Procrastinator
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Discussion Starter #11
I got hold of a Mikuni carb too, apparently a popular upgrade from the standard Chinese carb fitted to the YX140 engine, but it needs a bigger main jet, and I need to check the pilot too - from what I've heard they like a fat main jet, and a small pilot to run a little on the lean side at low rpm...
 

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Procrastinator
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Discussion Starter #12
For the Mikuni carb I had to get a different inlet manifold, as the Mickey Rooney hasn't got a flange (snigger) like the standard carb.
I bgot one easy enough, but the end doesn't quite match up with the size of the carb stub. Now, I could just leave it as is, or get a new end machined to match the carb stub and weld it to the inlet manifold... dunno, depends on time to be honest, and I'll probably fir the carb as it is now.
 

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Procrastinator
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1,057 Posts
Discussion Starter #13
But I did go to the effort of cleaning up the inside of the manifold, which was horrible with loads of casting 'flash' and a scabby finish. It looks rough in this pic, but it's far far better than it was to start with...
 

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Procrastinator
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1,057 Posts
Discussion Starter #14
Proper motorcycle work was avoided by making a stand, and then I'll be able to whip the wheels off and replace the crap wheel bearings with decent quality replacements. The stand was cobbled together with the steel from a couple of 'rescued' road signs, a piece of scaffolding plank and some goddawful welding...
 

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Procrastinator
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Discussion Starter #16
With the little bugger on the newly made stand, i got chance to spin the wheels and check the bearings. Crap. But I knew that. What came as something of a surprise was that the rear wheel span quite freely if span backwards, but didn't spin when given a shove in the normal direction. It was time for tea before I could investigate fully, but I think that there's an issue with the rear caliper...
 

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Super Moderator
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5,586 Posts
Remember to check bearing pricing before placing an order...
 

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Super Moderator
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5,586 Posts
Quad rear axel bearings... Can be had online for a fiver per side, 15 on the high side. Ordered to a local tractor parts shop, didn't check assuming around the same ballpark. Wasn't. 63€. Each. FKS but still FFS.
 

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Procrastinator
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Discussion Starter #20
When investigating the issue with the rear wheel not rotating properly (spinning freely backwards, but not forwards) I clocked that the brake pads are somewhat larger than the swept area on the disc... I'll take the grinder to the (new) pads so that the only contact patch is on the braking surface of the disc itself, and not the 'spokes'...
 

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