Ok here’s the plan I have one of each but basically there the same underneath so I figured do them both? Still waiting for the new front ends to arrive but should be ready for the first of April.View attachment 25910
not sure about that ian but i know it relates to the power valve - to powerful for me! always rode the big singles - scared my self to death when brought out there R series made my mind up then that it was better to say slow and safe. but had some good fun on them till i gave them up last year
The yzr M1 is the moto gp 800cc ballistic missile, the closest to it in road bike terms is the 2010 yamaha r1 which uses a similar design crossplane crankshaft, (often referred to as a big bang crank), if you watch footage of last years gp and see either lorenzo or rossi and listen to the engine you'll note it has a lazy sound compared to the screaming of the honda / suzuki's. These are all four strokes.
The lc was a range of two strokes lc referring to liquid cooled and the powervalve being a disc valve system which opened at a certain rev range giving a 'boost' of sorts, it was something all stroker msnufacturers played with to try and even out the performance as all two stroke machines are tuned via the length of exhaust and have a narrow 'optimum' power band, the expansion chamber, (spannies), in racing circles, goes part way to tuning this, the powervalve was an additional extension allowing exhaust gas out or restricting it to build back pressure. Sadly the eurocrats have killed two strokes and very few are available new, the poor learners today have to put up with heavily restricted wheezing four stroke singles.
The rd's were available in 125 single,250 twin, 400 & 500 variants, a whole generation grew up inhaling that luxurious blue smoke and they have a real cult following now.
m1ks, couldn't have said it better myself. I used to attend the Chas Mortimer racing school way back in the late seventies and he used to use the old RD 400's. If you were really promising he would let you use one of the LC 350's, which were stunning in thier day and my first introduction to liquid cooled bike engines. I remember them going past the pit lane and was always surprised at how quiet they were, more of a whistle than the scream of the RDs.
That particular range of Yamaha's became affectionately known as Elsies and are highly sought after. Mainly because most of them were thrashed to within an inch of thier lives so good condition ones are very hard to find.
very true and, ironically, the peoplelooking for good uns, treating them with kid gloves and bemoaning the fact that most were thrashed senseless were the ones doing the thrashing in their youth, not that i ever did that ofcourse, ahem.
Hey that's the one I has an LC350, without the power-valve!!! Totally insane ride. I thrashed mine too. Every thing that did not need to be there was pulled of. The Cast alloy wheels got the chop in favour of good old wire spoked wheels. Oh those where the days...
Oh my god so guilty I had a couple of rd's 250's the E they where the bees knees you could guarantee you would have to change at least one piston every 500 miles or so - but thanks to simple technology 8 bolts and the head was off bigger jobs were 6 engine mounts and out it came, had some fun on them - most memorable occasion was when we hit the ton on a long straight near where we live and the con rod sheared jammed under the exhaust port and left a perfect black line for 200 yards, new set of pant's required as well - no break down truck so we put it in the boot of a mark 3 Cortina and back to the workshop for a rebuild.
350lc were a hand full never owned one but drove a couple smooth as a kangaroo no happy medium it was all or nothing and the power band used to kick in whenever it felt like it funny times great memories
no not started yet cold weather has moved right in and the garage despite the heating is toooo cold to work in never mind paint so will wait it out for the start date - bought 2 front ends from hong kong so hoping they arrive by then
Hi sorry to take so long to get things moving I had planned to start 3 weeks ago but due to the very sudden death of my brother in law I had to put it on hold, it was a very sad time for all of us, he had just turned 50, so as a result I have decided to dedicate the builds to his memory.
Ok that said here’s where I am.
Picture 1 is the forks I bought from Hong Kong.
Picture 2, 3 & 4 is the main components normally I put these together first out of sequence with the instructions because I air brush the built up parts where I can i.e. the engine block, frame & fairings this allows you to fill and prime these part’s then after they have dried off to mask and spray the different tones required, the body work is always last on the instructions and personally I like to put them together first. This allows you time to fill rub down prime and paint over the length of the build if its left till the end you sometimes find you rush into it and settle for second best just to complete,
Never built 2 at the same time before but finding it interesting once you tackle the first assemble the second is a piece of cake mainly because you have crossed any bridge’s that have been placed before you.
these are all first fix i have done no filling or painting as yet