Trials Australia Forums

Quick BJ....grab that engine!!!:P

I can see the 4RT computers from here.


Best of balance.

Neo

So let me see if I have read & understood correctly.
You have invested X hrs disassembling and will need to spend approx X hrs putting back together. Your considering spending Y hrs "honing' a crank with a bush trick (interesting, but still a bit agricutural), then your going to run around getting a custom bearing made, for an out of round journal, that the machinist can't see or measure, unless you spend $ having a site visit. Machinist might giggle a bit on the site visit, but I love the 'rural' feel of your solution. Now all of the above is based on the concept that it "might" work & hold oil pressure? If it doesn't then your going to invest X hrs disassembling again, or additional costs to turn it into a new indoor trials section, or a lounge room talking piece.
Good luck with your project. But if you want a suggestion, just invest a few hrs in a proper disassembly (replacing and correctly greasing the rest of the vehicle at the same time), get the crank correctly machined & a bearing fitted. get the bores honed to FIX the original source of the problem and some new pistons. You know you want to do it this way, mostly because you really love that tractor, and you know you paid a "KIT" price for it, it's just that it came "attached" together not "assembled" as you know you can do properly if you just invest a little (extra) time. You can't ride after dark anyhow, & you need a winter after dark hobby now BigB has finished (or it it still going?).
just my $0.02

Cadman wrote:You can't ride after dark anyhow

I do......


Best of balance.

Neo

Cadman wrote: If it doesn't then your going to invest X hrs disassembling again, or additional costs to turn it into a new indoor trials section, or a lounge room talking piece.
Good luck with your project.

Cadman

You're perfectly correct and that is just the way I feel but WTF!!!! The emery resize is coming on just nice and I think I might patent the idea (wait until you see the pics)!

And if doesn't work..... I might go for the redhead fix (burn it). In the meantime, the battery is not flat yet and the crank is looking much better

The wizbang in engine crankshaft linisher!!!

Here it is, and yes the crank looks nearly good enough to fit a bearing to and the battery isn't even flat yet! It is a big battery. The only problem I have is I just figured out the engine is oil and water cooled. Instead of having water around the cylinder sleeves it has oil and then outside that is the water cooling in the block. What that means is.... any drop in oil pressure will have an impact on engine cooling because it may not circulate enough oil around the sleeves. The importer is making noises about doing a special deal on new tractor (one that you can buy bits for) so I think I'll leave the second belt sander belt in one piece for now.

The key to the linisher is Super Glue, it holds the emery to the cardboard and the holes stop the emery from spinning. Am I clever or what

And no the rod is not bent, it is angled so you undo the bearing cap through an inspection plate in the side of the sump.

This looks to me that is was always doomed to fail and I dont even know anything about engines! (Thats why I ride a Sherco, dont need to do any engine maintenance) All this time you could have spent working on the Scorpa!

But I do admire your ruthless and foolhardy determination however misguided.

And if it runs for even 1 minute after you put it back together, i'll take my Helmet off to ya!


Good luck, you need it!

Hey BJ,....congratulations!!!

You might want to get hold of this stuff before you start her up:-
http://cgi.ebay.com.au/ws/eBayISAPI.dll ... :IT&ih=008

There is an impressive video demo on this page too.

But before anyone asks....no you can't use this stuff in a Trials bike (I asked) because the clutch shares the same oil as the gearbox, it will slip ALL the time.

Also...for future reference...Repco do a super glue called QBond which I have used to glue cast metal back together ...It is expensive but it's still holding after 6 months of beating.

Best of balance.

Neo

BJ,

You have too much time on your hands.

Step 1: Grab a copy of Just Trucks & Heavy Equipment.
Step 2: Find suitable replacement tractor.
Step 3: Use new tractor to dig big hole.
Step 4: bury Chinese POS.

KJ.

PS. I'm sure there's a line in all this about Scorpas... anyone?

Sorry Keith,

I can't completely agree with you here.

Sure in the past those Chinese products were a pile of junk….”But times they are a changing” Who remembers a time (many years ago ) when Japanese products were considered to be junk???

This change is happening NOW…BJ’s example of Case New Holland (Fiat Group) now running the factory where his tractor was made, Is Fiat's "show of faith" that they can get the quality up and up. I’ve personally notice a rapid increase in quality in Chinese bikes (and many other products) these past two years.

And believe it or not, they already make Trials MotoBikes (well kind of Trials MotoBikes)…don’t they BJ??
And while I’m on this subject….BJ I have a confession to make….PM me if you want the gory details.


Best of balance.

Neo

Well if you are interested in Chinese made motorcycles, I came across these beauties, you may be surprised how good they are:

Pre war BMW R71 vintage copy -
http://www.chang-jiang.com/bmw/m1chrome.html

Jawa copy - 50's vintage
http://www.chang-jiang.com/jawa/jawa.html

A bit of the Indian Enfield Bullet concept.