Hi All,
After many years, yes years, slowly collected all the bits I thouhgt I needed to get my 750K2 back on the road, I finally decided "Today's the day!" Well that was yesterday. My first rebuild since I did a CB125S way back in 70-something!!
Bit of a story here. a friend who talked for years about making a trip to Vietnam, passed away last week. He never made that trip. I too have a trip I've been talking about for years - to ride from Belfast, Mpumalanga, South Africa, to the original Belfast in N Ireland - home originally. Well, I thought, I don't want to end up like old Rick, so I better get my skates on. Hence, yesterday became the day!
Anyway, decided to start on the engine which has been completely stripped, so I gave the crankcases and other bits a final scrub. They don't look at all bad - not like new, but better than I expected. So I was planning to replace crankshaft bearings, but on removing con rods, I noticed some deep scratches on the middle bearing shells. Manual recommends checking run-out in such a case, so will do that this week.
Then on to the transmission. This is where I hit the first real snag - snap rings on bearings. I had ordered bearings according to the numbers in the Haynes manual and was delighted when all arrived. But several of the bearings need a groove in the casing! Bu**er, should have looked more closely at the originals! So back to the online bearing guy.Living in Zimbabwe, local suppliers are like hen's teeth.
But now, eventually, to my questions:
1. Can the counter shaft bearing - on gear shift fork drum - be replaced on its own, or do I have to replace it and holder as a unit? Do I need to replace it? It seems smooth enough, but when all others are new ..... How do I get it out?
2. On the primary tensioner unit there is a needle roller bearing at either end. These are marked HK2520, and I think the dimensions are 25x32x20. Can anyone confirm these measurements and advise whether I should renew these at same time as all the others?
Thanks in advance, for what is probably the first of many questions.
Sean
