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Do I ? or Don't I ? [message #288652] Sat, 28 February 2015 16:57 Go to next message
pecker is currently offline  pecker   United Kingdom
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(11) MotoGP Podium Finisher
Repair the Blades gearbox think

Or get another engine to put in it

Anyhow i have made a start while i think about what to do, either way i am sure i will be asking you very clever and helpful people advice along the way

you were right about these bike work benches Quazi Thumbs Up


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index.php?t=getfile&id=21517&private=0
Re: Do I ? or Don't I ? [message #288653 is a reply to message #288652] Sat, 28 February 2015 17:11 Go to previous messageGo to next message
Quazi is currently offline  Quazi   United Kingdom
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(22) Giacomo Agostini
Thumbs Up

Mmmm that is a toughy Pecks.

Another engine is an unknown isn't it, you could be throwing money away if it ends up to be a bag of spanners!

The cost of your repair will probably still be cheaper than getting another engine, you can also use the strip down as an excuse to beef it up a bit, or port the head etc...

On a personal note, I'd rather deal with an known engine especially in a trackbike, unless of course you can pick up a good known engine from a friend.

You could of course do both, stick another engine in for the time being and sort you own one out over a longer period of time, some high comp pistons, reprofile the cams, slipper clutch etc... RollEyes

[Updated on: Sat, 28 February 2015 17:11]

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Re: Do I ? or Don't I ? [message #288655 is a reply to message #288653] Sat, 28 February 2015 20:31 Go to previous messageGo to next message
pecker is currently offline  pecker   United Kingdom
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yeah i am still in two minds Quazi

tho your last option appeals to me too

i am not confident about doing the work myself, a 2 stroke engine and i would

so for now i will take the engine out and ask around about getting it repaired, while keeping an eye out for another engine

Re: Do I ? or Don't I ? [message #288657 is a reply to message #288655] Sat, 28 February 2015 21:37 Go to previous messageGo to next message
Quazi is currently offline  Quazi   United Kingdom
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(22) Giacomo Agostini
I'll do it for ya mate if you can get it up to me that is. smile
Re: Do I ? or Don't I ? [message #288658 is a reply to message #288657] Sat, 28 February 2015 22:00 Go to previous messageGo to next message
Kermit is currently offline  Kermit   United Kingdom
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(22) Giacomo Agostini
I'm like you pecks, a 2 stroke I'd consider and have actually done [once], a 4 stroke especially 4 cylinder I've never dismantled more than a head and I'd worry about the complexity.

Can't help but as Q says, maybe if you can source a spare engine to use this summer (I'm assuming your wanting to get a few track days in) then you could take your time doing your proper motor then sell the stand in for not much loss. That said, an engine swap isn't a small job either so perhaps once you get the engine out you'll find the courage to carry on.

Good luck what ever you decide and keep the pics coming as yours is a cracking looking 929, lovely and clean and I have a passing interest in them Fluffle

[Updated on: Sat, 28 February 2015 22:01]

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Re: Do I ? or Don't I ? [message #288660 is a reply to message #288652] Sun, 01 March 2015 10:09 Go to previous messageGo to next message
Kakugo is currently offline  Kakugo   Italy
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(18) Geoff Duke
If you just need to work on the gearbox, you just have to to split the crankcase. Not exactly rocket science, but quite time consuming (the 929/954 has 20 or so bolts holding the case together, including some odd-sized M9). You may also want to have somebody helping you to remove the engine and putting it with the cylinder block facing downwards to work on it: while not as heavy as an engine from, say, a CBR1000F it's not exactly a bantam.
Once the crankshaft is split open, it's really not harder to work on than on a two stroke: gearboxes are the same thing. You will need a bearing press of some kind: since you are at it, you may just want to change the ones on the main and counter shafts. A local machine shop can take care of that for you, just bring them the parts and pay them. Wink
Re: Do I ? or Don't I ? [message #288665 is a reply to message #288660] Sun, 01 March 2015 22:59 Go to previous messageGo to next message
Pipe is currently offline  Pipe   United Kingdom
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(22) Giacomo Agostini
As I am crap at doing that sort of stuff and stuck for time mainly, I would send it to an expert, lay the cash out and get a guarantee of sorts from them.

But I am a lazy git, my RS has been in pieces since my last track day in September 14 eek
Re: Do I ? or Don't I ? [message #288668 is a reply to message #288665] Mon, 02 March 2015 08:55 Go to previous messageGo to next message
Kermit is currently offline  Kermit   United Kingdom
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(22) Giacomo Agostini
Pipe admit it, you've now forgotten how it goes back together Wink

[Updated on: Mon, 02 March 2015 08:56]

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Re: Do I ? or Don't I ? [message #288671 is a reply to message #288668] Mon, 02 March 2015 17:04 Go to previous messageGo to next message
DrMartin is currently offline  DrMartin   United Kingdom
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(18) Geoff Duke
I've never had a gearbox fail on me so I've only ever got as far as lifting all the shafts out as complete sub-assemblies when tearing down engines. Any damage in there should be quite easy to spot but I don't know how difficult it is to strip the gears / dogs etc from the shafts and replace them?

Re: Do I ? or Don't I ? [message #288703 is a reply to message #288657] Thu, 05 March 2015 23:00 Go to previous messageGo to next message
pecker is currently offline  pecker   United Kingdom
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cheers for the kind offer Quazi Thumbs Up if i was a little closer think

Kakugo, you make it sound a lot easier than i'm sure it would be for me

Dr. when i stripped the 125 it was obvious what was wrong, its just i am not sure i can strip it and get it back together Confused

Pipe, think i will get someone who knows what they are doing

nearly there....
aside from a few hoses etc to remove, its just the swing arm to detached from the engine, but i need to invest in a BIG allen key Laugh

index.php?t=getfile&id=21520&private=0
Re: Do I ? or Don't I ? [message #288889 is a reply to message #288703] Thu, 12 March 2015 21:30 Go to previous messageGo to next message
pecker is currently offline  pecker   United Kingdom
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tonight i found the tool i needed to get the swingarm off

index.php?t=getfile&id=21533&private=0

you were right Kermit its not a quick job dropping the engine out, i know i am only doing an hour here and there on it but i think i am almost there

no turning back now RollEyes

the cunning plan is to lower it right down on the rachet straps, block under engine, undo all the bolts and then raise bike back up, while its swinging there on the strap get someone to help me lift the engine into the van, what could possibly go wrong RollEyes

index.php?t=getfile&id=21534&private=0

i have also found someone to do the work smile
my mate who i bought the blade off recommended them Thumbs Up Laugh

[Updated on: Thu, 12 March 2015 21:32]

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Re: Do I ? or Don't I ? [message #288891 is a reply to message #288889] Thu, 12 March 2015 21:41 Go to previous messageGo to next message
Kermit is currently offline  Kermit   United Kingdom
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(22) Giacomo Agostini
pecker wrote on Thu, 12 March 2015 21:30
the cunning plan is to lower it right down on the rachet straps, block under engine, undo all the bolts and then raise bike back up

Thats how I removed the engine and put it back in the NC30 but without straps - engine on floor and lower or raise frame on or off it. Aside from possibly ligher engine same principle although I didn't have anythign else on the frame at the time so the frame was a lot lighter than yours with the front end hence the strap idea Thumbs Up

Good stuff finding that friend, an opportunity missed maybe to exile the fear of 4 stroke, 4 pot engine rebuilding but probably a safe bet on getting it done right and fairly quickly


Re: Do I ? or Don't I ? [message #288918 is a reply to message #288891] Fri, 13 March 2015 19:14 Go to previous messageGo to next message
Quazi is currently offline  Quazi   United Kingdom
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(22) Giacomo Agostini
Stop fannying about and get it done Pecks. Laugh



Well done mate, keep at it.



I've been doing a bit of wiring again myself lately, a cunning plan has been executed. Wink

I wish I could stop sometimes. Laugh
Re: Do I ? or Don't I ? [message #288933 is a reply to message #288918] Fri, 13 March 2015 23:01 Go to previous messageGo to next message
gone2 is currently offline  gone2   Netherlands
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(15) Kenny Roberts
Pecks I have a complets spare 929 gearbox. yours for the asking. PM me details
Re: Do I ? or Don't I ? [message #288935 is a reply to message #288933] Fri, 13 March 2015 23:23 Go to previous messageGo to next message
Pipe is currently offline  Pipe   United Kingdom
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Sorted Grin
Re: Do I ? or Don't I ? [message #288938 is a reply to message #288918] Fri, 13 March 2015 23:46 Go to previous messageGo to next message
Kermit is currently offline  Kermit   United Kingdom
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Quazi wrote on Fri, 13 March 2015 19:14
I've been doing a bit of wiring again myself lately, a cunning plan has been executed. Wink

I wish I could stop sometimes. Laugh

Bet you don't mean that as you'd be bored silly between outings for the bike if you couldn't find something that needed fettling Thumbs Up

I wish I had the same sort of bike in many ways as with the 929 for a few years now given it doesn't get used much all it needs every spring is an oil and filter change and a polish Wall

Having the kart helps but even that is now done and ready to go although my brother has come to the boredom rescue as we started rebuilding his rotax engine tonight but he f**ked up with the crank oil seals not realising each side has different inner circumferences (25mm and 27mm) till he'd mashed the thicker end of the crank (with splines) through the smaller one which had been inserted on the wrong side. If I'd have been in charge of the rebuild, I'd have known to check beforehand RollEyes


[Updated on: Fri, 13 March 2015 23:50]

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Re: Do I ? or Don't I ? [message #288943 is a reply to message #288938] Sat, 14 March 2015 08:15 Go to previous messageGo to next message
Quazi is currently offline  Quazi   United Kingdom
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(22) Giacomo Agostini
I think there are many folk on here that would have the ability if they really tried, a bit of confidence is all it takes, it's only mechanical after all, you can see it all in front of you.

Your very meticulous when you do anything Kermit, that's why you get it right most if not all of the time.

Preperation is key, research everything (Internet is good but not fool proof for this) you can about the task in hand to avoid any unforseen problems that can only be known by experience (which when you plan to do something for the first time you don't have the benefit of) are there any tools that you'll need for specific tasks, what parts/consumables are you going to need (order them up first as they may take weeks to get here, by then you would have forgotten how you took it all apart.)

Pictures do help a lot, I still take them so that if you find yourself in the waiting situation for weeks, you have an accurate reference to go back to.

For me, I'm afraid I've been like it since I could hold a spanner in my hand, just addicted to the sense of achievement I get by doing it myself, sure you make a few **** ups along the way in the early years, but that's how you hone your skills isn't it.

I'm sure pecks would be quite capable of doing his gearbox, but I can also understand why he doesn't want to attack it on his own.

I can't begin to think how much of my time has been spent over the years with my head in something mechanical (I'm sure the misses can) be it bike, car, van, lawn mower, anything.

My very first attempt was on my CB125twin, I used it as an introduction to despatch riding in London at 17, I then ran it low of oil, wore out the camshaft end bush then stuck car oil in it to get my home whilst it was knocking like fook.
Stripped it out, repaired it then went on to cafe racer it up (yes I know a 125, but hey I was 17) it looked great as it turned out, alpha 2 into 1, triton seat, lucas rear light, ace bars the lot. Laugh
Sadly I got no pictures of it, as this was pre digital. RollEyes

Sorry to ramble on your thread. smile

Keep the pictures coming Pecks. Thumbs Up
Re: Do I ? or Don't I ? [message #288958 is a reply to message #288943] Sat, 14 March 2015 19:02 Go to previous messageGo to next message
DrMartin is currently offline  DrMartin   United Kingdom
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(18) Geoff Duke
I agree with Mike, at the end of the day it's basically just nuts and bolts (and bastard circlips Laugh) and confidence. I got mine from stripping down my Suzuki 500 to fix the kickstart pawl when I was 18. I was lucky I suppose because at first I went to a local bike mechanic and he told me what was wrong and then explained that as the cases had to come apart to fix it it would cost a fair bit. Then he said if I got the engine out and brought that down it would save some dosh and then he said that if I stripped the engine down but couldn't get it back together he would put the box of bits back together for me. Thumbs Up Nothing to lose really. So, armed with my Haynes manual, and a few basic tools, I got started. It took me a while but I got it done and it fired up first kick when it was all done. Ok, it was only a 2 stroke but it gave me masses of confidence to tackle pretty much anything that didn't require expensive specialist workshop equipment such as presses etc. Next bike was the 650 Yamaha (4 stroke SOHC) and I had that apart more than once with no problems. The other side of it is that I just don't trust anyone else to take as much care as I would doing it myself - and that pretty much goes for anything that needs fixing.

[Updated on: Sat, 14 March 2015 19:04]

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Re: Do I ? or Don't I ? [message #288991 is a reply to message #288958] Mon, 16 March 2015 16:40 Go to previous messageGo to next message
Kermit is currently offline  Kermit   United Kingdom
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(22) Giacomo Agostini
DrMartin wrote on Sat, 14 March 2015 19:02
The other side of it is that I just don't trust anyone else to take as much care as I would doing it myself - and that pretty much goes for anything that needs fixing.

I subscribe to that mantra Thumbs Up

Luckily there's a UK legal requirement that gas appliances can't be touched by unregistered people to protect me from myself Laugh


Re: Do I ? or Don't I ? [message #288993 is a reply to message #288991] Mon, 16 March 2015 18:23 Go to previous messageGo to previous message
DrMartin is currently offline  DrMartin   United Kingdom
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(18) Geoff Duke
Kermit wrote on Mon, 16 March 2015 16:40


Luckily there's a UK legal requirement that gas appliances can't be touched by unregistered people to protect me from myself Laugh





The problem with things like CORGI etc is that they exist to protect the fitters when they cock things up, rather than protecting the public from their bad workmanship (which I've seen more than enough of). If I can get the parts I fix my own boilers. Fook 'em. Thumb Down

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