Thanks to Easter, Iv’e been able to advance this project.
From this
to this
Everything went smoothly, except that the head gaskets in my kit are much thinner (0.5mm) as the original ones(1mm). What should I do? I can always re-anneal the old ones. For those of you who don’t see much difference, THERE IS!
New crank, new seals troughout, new gaskets. I’m always surprised to see how clean these motors can stay IF there’s some oil in them.
I might need a mate around for the fitting in the frame, with everything on the motor, it gets pretty heavy. I still have to redo the pum and fab a new oil pump cable.
It looks like I’ve manged to bend a rod on the 1WU… never push start a bike downhill, if you think the crank might be full of oil and gas… My petcock was obviously leaking. It wouldn’t start, so downhill I went. result: an impressive black and rubbery comma drawn on the road. So much for a 10’000 km bike… It is now vibbing quite badly. Have to keep it on the road untill the 31K is Ok and MOT’ed (The Dreaded Expertise).
After honing these cylinders at the shop, I couldn’t fit the pistons confortably… seemed like one of the jugs was tapered. Brought these to a old shop that will properly hone them (Sunnen Hone). Turns out, one of the base cylinder flange was cracked and that probably caused the bore to fuck up.
Funds are low… no more eBaying for me. I thought I might try to turn some of my stuff into much needed ca$h. Spent quite a bit of time riffling through my pile of YAmaha NOS stuff that came with the 1UA. This could fund most of the RD400 parts.
Received my A7 motor bottom-end from the States. Kindly repackaged by GAry from Minnesota… it arrived in a perfect state.
Couldn’t have happened without him.
RD 400D Total Cost (shipping to Switzerland included): 1129 CHF, roughly 930 US$
Bike wreck
Crankshaft 2nd from SirYamaha
Rebore
Hone
New pistons 54.5
Gaskets, Oilseals & Manual from Sirius Con inc. |
Free!
305.75$
90 CHF
98 CHF
Free! (from the breaker’s stock)
82.50 $ |
Fork seals from krisodemus
Air Filter
Caliper seals and a bunch of small goodies (HVC) |
6 £
18.95$
205 $ |
Carbs and petcock seals from Sirius
Electrical loom complete with accessories
Rectifier |
59$
77.5$
25 CHF |
Well, these guys finally did quite a good job out of it and for a decent price. I still have to chamfer the ports and then we’ll hone the jugs to correct spec. They bored to 3/100 and we need 4 to be safe with standard Yam pistons… except the honer hasn’t got long enough stones for the T shaped intake prto of the RD400.. off to find some.
Brought the cylinders with pistons to my usual workshop. It was a bit worrying as they suddenly look like they didn’t know what to do with it! They don’t have a bore machine but will ut it in their big digital center… and finish it with a light 3-stone hone… We’ll see next week, but I might have to change shop.. Plus I will have to do the chamfering and cost per cyl is around the 100CHF mark, a 20% increase from last time.
Before tearing into the RD motor, I decide to order the necessary stuff, if possible in one place, in order to save a bit of dosh.
Sirus Con Inc, had almost everything I needed. Check this ebay seller: Carb kits, gasket and seal kit, even a manual.
Received all that today. We’re all set to go.
I sold today a bunch of DS7 pistons I didn’t need to a gent in Germany. These guy work on Adler motorcycles from the 50′s… a direct link to YAm as the Adler MB250 was used as the basis of all YDS bike. No wonder the pistons fit straight into the german bike!
I’m sure they could use RDLC pistons from Wiseco if they didn’t have the reed windows cut in. Read somewhere that Wiseco would do them at no extra charge. Something to check.
Here’s their little museum with NSU and Adler bikes.
April 20th,2006
DS7,
Yamaha |
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