RD350 N1 Frame
Wow! it’s been a long time since I updated my blog. I haven’t been able to find the time to do anything on the bike for a long while. This week, I made sure I found the time!
I’ve put the engine rebuild on hold for the moment. I’ve got everything to put the engine back together and I’ve had a piece of the top crankcase welded back on (picture to follow), I just need to spray the top crankcase black. Unfortunately the weather has turned cold and damp and I don’t have somewhere warm and dry where I can spray paint stuff. As this part is quite visible, I want to make sure it looks good. I’ll scout about for a good place to spray, or maybe have to wait until the weather warms up again.
So, I’ve spent my time stripping the frame down. Everything is now off the frame and it’s ready for blasting and painting. Yep! I’m going to paint rather than powder coat. I just feel that powder coat on an old rusty frame is asking for trouble down the line should moisture get under the coating. At least with paint it will bubble and become obvious that a touch-up is required, that’s my theory anyway :-).
Luckily the frame looks structurally sound, the rust just appears to be surface rust. Obviously I will know more once it’s been blasted.
RD350 swingarm assy
Stripped RD350 frame
Stripped RD350 frame
Yamaha RD350 YPVS Crankshaft
My new crank arrived from Yambits. Seems pretty good. Shame it didn’t come with small end bearings, I will have to order some.
I maybe presuming, but it looks like the crank may have been built up by Grampian Motors. My crank was wrapped in newspaper with Grampian Motors tape holding it together.
Just got to get my crankcase top half fixed and painted (more on that to follow) and I’ll be able
to put the bottom end back together. It will be nice to be re-assembling something rather than taking stuff apart.
Had quite a few parts turn up over the last couple of weeks and I was going to write up a few posts over the weekend, but unfortunately ended up in Accident & Emergency on Saturday morning with a badly burnt hand.
I was helping my brother-in-law remove the engine from his race car and managed to pour boiling hot radiator water over my hand, not good. Anyway, luckily it was just my hand that got burnt and not our faces, the water was under considerable pressure. A lesson learnt, let the engine cool completely before taking water pipes off, or just stick to bikes
Anyway, with regards the RD, I’ve had a crank turn up, some wheels and tyres (my eBay bargain) and I’ve been checking out the state of my forks. Stay tuned, I will write up some posts covering these bits-n-bobs this week.
OK, so I took the plunge and ordered up a new crank, it’s on it’s way :-). I decided to stick with the standard pinned main bearing version rather than the fancy one with ‘O’ rings designed for worn cases. My case looks OK, so all should be good (I hope).
Yamaha RD350 YPVS N1 Frame
I spent some time over the weekend attacking the frame. Had the usual problems with rusted bolts, breaking bolts, soft bolt heads etc. but with copious amounts of penetrating fluid, some ingenuity and a few choice swear words, I managed to remove the front end and most of the bits up to the middle of the frame.
The person that invented the Impact Driver should get a medal and the person in charge of metallurgy at Yamaha should be given a new job, maybe as the tea boy at Fukushima.
Yamaha RD350 YPVS Exhaust
I’ve been painting again. This time one of the exhausts. As you can see in the comparison picture, there was quite a bit of surface rust to get rid of first. I’ve worn out at least one wire brush and a wire disc for the drill and painted about half a tin of Jenolite onto the rust to keep it at bay. The result isn’t too bad. I kept the road rash on the pipe intact, just to keep some character (and I also didn’t think filler would work on a hot exhaust).
Time to start work on the second pipe. I may see if I can get it sand blasted to save a bit of time (and wire brushes).
Some of my new parts arrived yesterday :-).
You don’t get much for £230! but I’ve got all of the seals, gaskets, oil lines a rather expensive thermostat (£38) and a tube of crankcase sealant which came in an interesting box lets hope the product is better than the spelling on the box.
Still working on the crankshaft, I’m really going to have to bite the bullet at some point and drop the cash on a new crank!
OK, I’ve sold a few things and have some cash to continue.
Since my last post I’ve ordered up all of the gaskets, oils seals, clutch springs etc. that I need to put the engine back together. There’s still a question mark over the crankshaft. There are two possibilities, one standard job, or one that has ‘O’ rings around the main bearings to stop them rattling in worn cases. I’m not sure which to go with yet. I’m thinking about just sticking with the standard crank with pinned mains.
Yamaha RD350 YPVS Head
I’ve had my rattle cans out (paint cans) and sprayed up the head, I’ve also done one of the barrels (in satin black). The second barrel is waiting on a soda blast before painting.
I’ve also started to strip and clean up one of the exhausts. Both exhausts are quite rusty and are taking quite a bit of elbow grease to get cleaned up. Luckily, under the grime and surface rust, they are in good shape, so hopefully they
Yamaha RD350 YPVS Exhaust
should paint up quite nicely.