Adoom

I got a couple of tyres from Rex. They looked a bit too big in diameter....

It was a real bastard to loosen the bead to get the old tyre off the split rims. It took me over an hour to get the old one off and put the new one on. Once the new tyre is on you can see that it's the right size.

It stops a lot better now.

Used Racechrono on my phone and went for a 17km ride after steak.

I can just get to 50kph on the seal I think it's running out of revs. Just over 40 on gravel.

170kw.

I am running rose joints with parallel arms and a panhard rod. I did it because I had problems with axle tramp and wheel alignment with the factory arms/bushes.

I also tried poly bushes at both ends(I thought the rose joints were shagged, but it was diff noise), then it was pointed out that they were so stiff, the diff could only go up and down but not twist, so I went back to rose joints.

I like the direct feel. 

No problems with mounts cracking.

Noisy as in a stripped car though. I get a lot of noise transmission from the LSD. But racecar, so who cares.

I got some slicks from Rex, and normal ones from the US. Never ran the slicks on the bike, just the chilly bin. US was pretty cheap in the end. Also got new wheels, sprockets and brake as the original plastic wheels were terrible and broke. Got some aluminium ones and were the bees knees

The tyres from 'Murica are cheap. But I only need the tyres, so the $60 freight kills it. I'll try Rex on my lunch break tomorrow.

Does anyone know where I can get a new tyre in NZ? I have Cheng shin 4.10 X 3.50 - 5"

yup yup luke put a little vid of their ride up on machineofmayhem.com

Just watched that.

Would be keen.

I've done most of the Eastern bank trail on my mountain bike. Almost none of the western bank.

Gave it some fuel system cleaner(probably way more than necessary). Seems to be going a lot better now. Took it for a ride along the Hutt River trail from Totara Park down to the gate for the Trentham golf course. Was about 16km according to the gf mountain bike speedo.

It used over 3/4 of the tank. I've not worked out how big it is, but it seems like a lot.

How far have other people ridden their mini bikes on one tank?

The chain came off once, but it is easy to remove the link with my keys, just annoying cause it jambs between the frame and the sprocket and makes the wheel lock up.

Has anyone tried making some kind of tensioner thing?

Sweet as then, that clears that up. 

Do a skid bro. 

Already did a couple on the garage floor. For...... testing... You have to give it some help and lighten the rear end to get it going. Quite a bit of rubber came off in a short while, the tyres are showing their age.

How strong is the mounting for the brake? Is it secured to the engine casing????? 

A stronger point would be the frame of the bike. 

There are four threaded 3/8th holes around the crank.

I have a 25X2.5mm flat bar vertically between two of the holes.

There is an M10 bolt welded to the plate.

I've drawn in the plate and bolt holes and direction I think the force will go.

This appears to be a fairly common arrangement....

Maybe it needs the plate to go to three of the bolt holes, to cut down on the levering forces on the bracket? 

In hindsight, maybe the band should be flipped around so, when braking, it pulls on the mounting end instead of pushing on it? 

But, with the forces involved, will it really matter?

It seemed to start a lot easier with a clean filter. I've not been able to test it yet, as I had only half assembled the band brake.

I had to change the brackets on my guard so it fit with the brake.

Not sure if the spring is required, but I had them....

I still need a brake lever.

Hey!!! Where'd my far-too-heavy muffler go on that last ride?

Old and new air filters. LOL!

Brake band and air filter arrived this morning.

Now I need to find a cheap/free brake lever and cable.

I'll have another go at cleaning the carb.

The outlet for the tank has a fine mesh screen filter. Maybe I should change the fuel hose, could have some crap/varnish in it.

I've ordered a clutch band brake and air filter from eBay 'murica. 

It doesn't pull consistently. It sometimes pulls good from go, but after running for a while it loses power. If I hold the throttle open it sometimes picks up. If I fiddle with the mixture screw it sometimes helps, but it eventually happens again. I was going flat out over a field and it was going well, but the revs would drop and eventually pick up again.

It had a full tank.

Any suggestions? Could it be the governor? It's not loose...

I want to modify my seat. Us big kids sit too far back on the seat making it squash and overhang. I'll keep the same shape, but try get some denser foam padding to make it harder at the back.

Anyone know if I can get a clutch band brake in NZ? Or do I need to go through OMB, or Ebay?

It was raining this morning. No ride.

So I made a clutch guard.

By then it had stopped raining, bloody windy still. Pushed it over the road to the park. Went the back way to pick up my bro and nephew. We went for a hoon along the stop-bank park thing. It was a bit sluggish until I wound the power jet(?) screw out a bit. Got up to about 30kph with a tail wind. Work boots do not make effective brakes.

Threw the chain a couple times. Seems like it stretched a bit after first use?

Rode it back home and hosed all the mud/grass off.

Re-adjusted the chain and gave it some proper motorbike chain lube. Also adjusted some metal where the wider chain was touching it.

Painted the guard.

um, just buy a bicycle disk brake and smash it on the cog or something similar

Even if I space the caliper to fit over the sprocket, I think it's too small and the pads would just get chewed up by the teeth.

Pretty sure I won't be able to fit a bicycle disk brake to the front wheel like I thought. If I space the disc out as far as I can, there is still not enough room to fit the back side of the caliper between the disk and the wheel/tyre.

I'll have to try get the original rear caliper working. I think half of it is missing. There is no friction material, only hard plastic.

Totally got to take it out tomorrow along the stop-bank.

Got my sprocket back today.

Shortened the chain like four times before I could adjust the tension right.

Couldn't resist taking it for a blat in the back yard. Yep.... no brakes could become a problem.

Dropped the sprocket off with my engineer mate to machine when he is at work next week. I should make a chain/clutch guard so it doesn't eat my jeans/leg...

Ignition switch

The practically useless stand after I straightened it.

Original OOOGAAH horn from 70's

My sprocket arrived yesterday. I just have to get around to seeing my engineer to machine out the center hole because it's a blank with just a pilot hole. 

I attached the throttle cable and greased the throttle handle last night, then promptly broke the nipple thing off the end of the cable.(It was very frayed).

I picked up a new brake cable from the cycle shop today to replace it with.

Thanks bathcollector for the clutch and Seedy Al for delivering to me at work.  

The stand is turd. Try and find a stiffer spring for it or it will roll forward or backwards and fall over. They are long enough just not strong enough in the spring. looking good so far. Is there any movement in your headset bushes ??

The stand was assembled in the wrong order when I got it. Spring on outside LOL.

I put it back together with a washer between the spring and split pin. I was going to put a washer on both sides of the spring, but couldn't compress it enough to get the pin in.

The headset bushes don't have any noticeable play. I cleaned them up and put plenty of grease in there.