Search found 45 matches

by TurboStew
Sun Jul 22, 2018 12:14 am
Forum: KR250 Chat
Topic: Team Green
Replies: 4
Views: 917

Re: Team Green

Well I would have one, Intact I'm up to 6 bikes at the moment and have no plans on selling any time soon. Well the latest KR came close a couple of times, even just yesterday as I couldn't get it started after installing the engine from a rebuild. So that was a little annoying. Give me FREEEEEEE pos...
by TurboStew
Sat Jul 21, 2018 2:35 pm
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

It's always interesting to discover why a part fails, e.g the gearbox shaft. According to the service manuals the input shaft's second gear is fixed by the splines on the shaft, next to it is 5th gear which is free to rotate when not engaged. 5th gear is engaged when the combined 3rd/4th gear slide...
by TurboStew
Sat Jul 14, 2018 12:38 pm
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

Thanks Gerrit, your 100% correct in my description and your interpretation of my post. Yeah I figured not a simple fix and figured the case will have to be machines and new steel shells fitted for the bearings and yes they are held in with some sort of dovetail. Lucky I had another 1/2 decent set. S...
by TurboStew
Sat Jul 14, 2018 10:15 am
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

Hi, I'm Just wondering if anyone else has had this happen to their engine casings? On the engine I was rebuilding, both the LHS front and rear crankshaft cones that are factory fitted into the aluminium casings have both hammed out in the casing. They will not come out even though they are loose. Th...
by TurboStew
Fri Jul 13, 2018 1:35 pm
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

Yet another day with nothing to show on this bike, talk about one step forward, 10 steps back. Started to put the motor together with all new bearings and seals. the old motor had a lot of bearing play on the water pump side in both crankshafts. The bearings just fall off the LHS of the crank shaft ...
by TurboStew
Thu Jul 12, 2018 1:20 pm
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

Went out to my garage today to put the motor back together, but I couldn't bring my self to do it because the paint on the cases was faded, peeling and scratched. I stripped all the paint off and masked them up and re-painted them. They look good now. Some pictures: Repaired shaft: http://rs1313.pbs...
by TurboStew
Wed Jul 11, 2018 12:45 pm
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

Correct But these engines do end up sucking the oil from the gear box in to the crankcase. The pressure fluctuates and become a negative pressure/vacuum to draw the air and fuel in to the engine. I think this is why they do end up sucking the gear box oil into the engine. So someone has reversed the...
by TurboStew
Tue Jul 10, 2018 11:05 am
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

I went to my local welding and gas cutting supplier today and took the shaft. We had a bit of a chat about the best way to repair the shaft with the tools and equipment that I had available. we decided to use the Oxy-acetylene welder using a slightly oxidising flame and NBF rods (Nickel Bronze Fille...
by TurboStew
Mon Jul 09, 2018 12:12 pm
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

Thanks, That's a good idea. I was thinking of machining down the circlip lands and pressing on a sleeve but that's a better Idea. I will heat the shaft with the oxy and then use the Mig to tack some lands back on. Sounds like a plan.
by TurboStew
Sun Jul 08, 2018 11:18 am
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

Thanks for the reply StrokerBoy, it's never to late for some feedback. If you think you missed the boat this time well in fact your just early for the next one :lol: Okay here my update. I went back to the guy I purchased the bike from today, he gave me another engine. Well no top end, lust the box ...
by TurboStew
Mon Jul 02, 2018 8:27 am
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

Yikes! exactly, and more to follow. I split the bottom end today into two halves. I had trouble getting some of the bolts out as someone has had it apart before and some of the screw heads were a bit rounded off, I had to drill one bolt head off to get it apart. The main shaft is damaged. The circli...
by TurboStew
Sun Jul 01, 2018 11:59 am
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

I tried to upload some pictures but got this message:

"It was not possible to determine the dimensions of the image. Please verify that the URL you entered is correct".


I was trying to direst upload from my computer, File size was okay, but can not post pictures. :roll:


Stew
by TurboStew
Sun Jul 01, 2018 11:49 am
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

Progress update: The motor is out and on the bench. Head and cylinders off, the top end looks good, only some minor scuffing on the front piston back top ring land. But there is a few surprises of the negative kind as I started pulling it down further. The water pump was seized and had spun the impe...
by TurboStew
Sun Jul 01, 2018 5:47 am
Forum: KR250 Chat
Topic: Kr 250 A Blowing smoke using gear box oil quick
Replies: 28
Views: 890

Re: Kr 250 A Blowing smoke using gear box oil quick

Cheers, Yeah it looked like it was going to be a bit of a squeeze. It's got to come apart anyway, so I will tale the top end off in the frame and then pull the bottom end. Iv'e just been studying it and started pulling off a few bits to get it out and got a bit of a surprise. It had an bad oil leak ...