Forum whore
and the go fast mod was to turn the handlebars upside downOriginally Posted by TZ350
and some more pics of the same 2 bikes
and at least one has now split into 2
the engine is now in an rs frame and the old frame has a cb100 in it for F5
the other has the engine in an fzr frame and the old wheels are on an rg50 with the frame being saved for something els (turboed 100 I heard but dont think they will get around to it)
"Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
Saying what we think gives us a wider conversational range than saying what we know. - Cullen Hightower
bucket blingster
Had a round of buckets at Bears round on Sunday, good to see some new guys turning up, and other guys turning up with new rides.
Had a guy first time out racing on his RGV framed Loncin
Another new guy had bought a tidy FXR ready to race, plus the $1000 bike ex Stu Hines. Ghostie was out on his new FXR, one of Brendans specials, a step up from his old TS125 racer. We had the current NZ 125 champ out on a CBR150, and even Brendan brought a new toy to the track for the first time!
Seems there is plenty of interest still down this end of the country!
No8 Wire Extraordinaire
Yeah he said he was going to test out the TZR, obviously it stayed together?
Don't you look at my accountant.
He's the only one I've got.
Long Haired Yobbo
I'm quite enjoying slowly evolving my engine, It's cost stuff all over the time it's taken and the satisfaction of improving it is fantastic.
11 hp with less than a 1000rpm spread was pretty bad and very hard to ride but I still managed to keep up ok.
After what I saw looking over your shoulder today I'm even more dubious about what one is likely to find inside an old MX engine...
Heinz Varieties
Long Haired Yobbo
This post is a bit weird, it was meant to be two but I juggled things around so they work better.
I still don't agree and think it's very poor form to show up on one. It's not the same as bending rules to suit a bike someone wants to get started on and I really can't see positives that outweigh the negative 'arms race' factor.
If making cheap, easily competitive buckets is really the goal; importing an container load of CBR150's or similar from Southeast Asia sounds like a more useful approach.
Legalise MX 80's and it will be good for the first few on-board but soon market forces will make them the same as everything else or likely worse due to 'flog factor' and the harder tuned nature of them, sure the pistons will be better quality but we can already use MX pistons.
Here is an auction worth looking at:
http://www.trademe.co.nz/motors/moto...-494250442.htm
Why not hit him up about the GT engine and use that, perhaps you could share development resources with Drew to get a single 24mm carb working on one. Much easier with pooled resources as the ESE guys constantly show.
A CR 80 could make an interesting powerplant for a pit-bike sidecar...
Heinz Varieties
Ta
I've been giving that some thought. There was evidence on the piston of a siezure, but none in the bore. With that much play the slug wouldn't sieze anyway, it'd pitch sideways and get caught under a port edge or summat.
That motor has been completely bastardised, and then it's been botched together to get running with parts that someone has scrounged out of other shit.
I doubt an 80 would still run in that condition, to be ridden even down the street.
Forum whore
Having lots of play actually increases the chance of seizure, all the blowby gas going past the rings helps the oil film in the bore to break down, causing a seizure. Otherwise everyone would run massive piston bore clearance
My neighbours diary says I have boundary issues
Ta
That makes sense, but the piston looks like a cheese grater, and there's not a mark on the bore. The motor in question is something very dodgy, in so many ways I can't comprehend.
Forum whore
Wot, stolen???
Ta
Not that we know of. Is an MX bike though so who would know.
Motor has been stroked, sleeved, power valves welded open and shit. Was prolly quite the weapon when it was being raced even though it woulda been illegal. Thing is though, piston in there reads 67.5mm but has more than half a mil of slop, so we can safely assume it should be a 68mm. The small and big end bearings are fucked. When I took the stator cover off to get the clutch cable out, I need to put the drain tray under it to catch all the petrol.
This is a bike that requires new rims, because the spokes were left loose too long, and they have all stared to pull through the rim.
New fork seals, after the gromet things are replaced to get rid of the play in the forks.
All this from, "could you come over and get the breaks working on this bike for me"?
No8 Wire Extraordinaire
Ahh, old dirt bikes & the questionable parentage of their previous owners.
Don't you look at my accountant.
He's the only one I've got.
Long Haired Yobbo
Should probably measure that, even if just with feeler guages.
I've seen seize marks on piston with a clean bore before, I think it might happen sometimes if it seizes not-too-badly when it's hot and then is cooled, started and ridden again. Rings clean bore.
Heinz Varieties
Ta
Should probably measure that, even if just with feeler guages.
I've seen seize marks on piston with a clean bore before, I think it might happen sometimes if it seizes not-too-badly when it's hot and then is cooled, started and ridden again. Rings clean bore.
Priced up the new bits for that thing today. $2600 provided nothing else is fucked. That motor will be going to the scrappy.
Crank is from a 360 motor, slug is standard size for the 250, and the fact that it's sleeved is just fuckin weird man, perhaps that piston seized in the ally bore, and they chucked some steam pipe in there but didn't do anything about a new piston.
Too many what if's, bottom line it's not going back in.
No8 Wire Extraordinaire
MX parts are a good source of cheap bits & rebuild cranks themselves. But yeah sleeves are a naff solution & never know how well has been done.
Don't you look at my accountant.
He's the only one I've got.
Unknown Disorder
Sounds like a case of "throw it away mate" to me.
Stock is best
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