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Messages - eight0
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76
« on: March 04, 2021, 12:17:11 PM »
I hear what you're saying Dave, but sometimes you just have to pick your battles. I have what I need because luckily I had the spares already as you say.
I just can't be bothered with the hassle. I paid £60 for the crank and rods so we are only talking about 20 quid max. It's just a shame they don't seem to respect the customer.
77
« on: March 04, 2021, 11:43:50 AM »
DK have been pretty unhelpful about the bent rods.
I messaged them about the bent rods and they came back and offered me replacement ones. I said that I had some spares myself which I used and asked them for a partial refund.
They said 'glad you sorted it.'
I again asked for a partial refund and they said, we offered you replacement rods and you said no.
Oh well.
78
« on: March 03, 2021, 08:43:31 AM »
Thanks guys, yes certainly learnt a lot!
Does anyone have any sources for the M8x145 engine bolt? Mine is bent for some reason. They are available on CMS and DS for order from the states but there must be somewhere I can just order a flanged bolt from.. or another bike that takes the same sized bolt.
I will have a look to see if we have some here.
Thanks Julie, that would be great.
79
« on: March 02, 2021, 06:27:28 PM »
Thanks guys, yes certainly learnt a lot!
Does anyone have any sources for the M8x145 engine bolt? Mine is bent for some reason. They are available on CMS and DS for order from the states but there must be somewhere I can just order a flanged bolt from.. or another bike that takes the same sized bolt.
80
« on: March 02, 2021, 07:03:46 AM »
Thanks Julie. I'm pretty new to mechanics and have never taken apart an engine completely before but I do feel like a bit of a walley for not noticing the rods sooner. Ah well. Glad it's sorted now!
Put the time in yesterday to get the cases back together and back in the frame so now at least I'm back to where I started.
81
« on: March 01, 2021, 05:20:00 PM »
After all that, there doesn't appear to be a problem with the rings. Replaced the rods with the ones from the old crank, luckily I had the right bearings. Removed the chains and put a couple of bolts in the cases to test and... https://youtu.be/9eBTKUbwU74The moral of this story, is always check your second hand parts thoroughly. Thanks for the advice everyone.
82
« on: March 01, 2021, 03:40:11 PM »
Thanks guys.
Well there's still the oil ring problem. On the bench the pistons were still too tight, but I'll get back to that once I've fixed the bottom end.
83
« on: March 01, 2021, 03:10:22 PM »
Crank and rods were from DK.
84
« on: March 01, 2021, 02:37:26 PM »
Yes! Which is why the middle two pistons were centered out outside weren't.
Think it's safer to use all 4 of my old rods?
85
« on: March 01, 2021, 02:33:26 PM »
Can I use my original rods?
The new crank and old rods make Brown, green green green all of which I have.
86
« on: March 01, 2021, 02:09:22 PM »
I put one of the Conrods from my other crank on number 4 and it was fine. Took a closer look at the one I took off and... Spot the problem? Well, bugger.
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87
« on: March 01, 2021, 12:28:58 PM »
Have you tried swapping the oil rings around between the pistons? This will tell you if it's the piston ring gap not having enough depth or if it's the actual rings at fault. The 250RS piston I had a similar issue with was a pattern part from DSS. I can't remember the actual make but it was pattern but not IMD or Cruzinimage. I remember it was in a blue and white box though.
I meant to say ring grove depth not gap! Although interesting to see if the ring gap is larger or smaller if fitted to another piston but in the same bore.
Yeah I tried different rings on the same piston and no difference. It doesn't seem to matter which combination of pistons or rings I try, the oil rings jam the pistons up.
88
« on: March 01, 2021, 12:11:49 PM »
I think I'm going to have to split the cases and double check the rods are on the correct way around. I really didn't want to have to do do it, but at this point I have to rule it out.
89
« on: March 01, 2021, 12:03:46 PM »
Just tried swapping 3 and 4 and the issue with centering doesn't go away.
Yes I mean I measured the crown above the top ring not the body, just to show how much is was pressed on one side.
90
« on: March 01, 2021, 11:48:52 AM »
There's still another problem besides this. I test fitted the pistons and barrels to see if, without them binding as much it would turn over ok.
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Both outer pistons are still not centered. On piston 1 The inner side has +.60 clearance and on the other side I can't get a .05 feeler in the gap. It's the opposite with number 4. Gap is on the outside.
Sorry for the flurry of messages over the last couple of days. I took Friday and Monday off work to make some progress and this has stopped me in my tracks. I appreciate all the help.
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