RD 350 LC - 1982 - bounty like my bike in the 80's, finally got an original UK one. 31K/Aprilia RS hybrid - ex Yogi and Muttsnuts bike - my first hybrid Triumph Street Triple R (sorry!) ...and a box of bits I hope to be able to turn into a 1983 31K
Post by midlifecrisisrd on Jul 11, 2019 23:04:23 GMT 1
Nah, just couldn't do it. Like to know what's inside so engine out and stripped the other night
The milometer seems to be telling the truth (6700miles) as standard bore and most of the home marks are still visible although polished out on the inlet side so lubrication maybe poor or more likely way rich. Got an arrow built pump to go on anyway.
Few strange anomalies
First - 3 head bolts let a jet of high pressure petrol fly out. Never seen that before.
Head did not need tapping to release so assume the gasket wasn't doing the best job
Second - head looks skimmed. It Stoll has a lip at the edge of the dome and not flush at the underneath of the thermostat area but looks too clean even out with the gasket covered area and machine marks very visible with no previous gasket face cleaning mark.
May be a mod to up compression to go with the tzr race pipes.
Third - motor has been open before and crank seals very supple so assume they have been previously changed but I'd split the cases specifically to change them so new gen seals fitted. Replacing them all while it's in bits
Fourth - pulled the circlip out the lh piston and the cast on the ridge broke off so glad I decided to pull them out
Fifth - initially thought I'd wasted my time splitting the cases as seals seemed fine but was glad I did as when cleaning the old sealant off the crank cases I found the best thing that took it clean off was PETROL 🙄
Also my thought on it passing fuel into the crank cases which then made it into the gearbox was confirmed by this pic. Now remember this had been started by me before stripping