Author Topic: 1989 K75 reanimation (Read 32619 times)

koshak · « **Reply #150 on:** May 27, 2021, 10:18:12 AM »

little work with grinding tool and hole shows

koshak · « **Reply #151 on:** May 27, 2021, 10:19:54 AM »

to close the hole welding job was outsorced

koshak · « **Reply #152 on:** May 27, 2021, 10:21:07 AM »

that in turn required machining of the contact surface

daveson · « **Reply #153 on:** May 27, 2021, 05:35:17 PM »

Thanks again Koshak for sharing your deep commitment to keep a brick going.

koshak · « **Reply #154 on:** May 28, 2021, 05:08:58 AM »

you may be interested how corrosion looked from inside. Here it is:

koshak · « **Reply #155 on:** May 28, 2021, 05:30:02 AM »

i did not like how my recently purchased heavy lifter table occupy the middle of workshop, preventing normal walking when no bike installed. It also required fixing to the floor, otherwise it was impossible to get bike rolled on it. Also, my floor originally was inclined - did not create problems before table appeared.
So these issues called for little side project, while waiting spares.

workshop was emptied and tiles removed

position marked and base installed

koshak · « **Reply #156 on:** May 28, 2021, 05:33:59 AM »

after table placed on the base, floor around was raised

spare parts for the floor upgrade:

koshak · « **Reply #157 on:** May 28, 2021, 05:39:36 AM »

koshak · « **Reply #158 on:** May 28, 2021, 05:45:02 AM »

pros:
- very easy rolling in/out
- comfort in the workshop when no bike on the table

cons:
- lost in max table height about 20 cm (however during later use did not find it as inconvenient)

koshak · « **Reply #159 on:** May 28, 2021, 06:05:56 AM »

back to the story.

Conrod bolts.

Prior i did that order arrangements through the local workshop - I placed an order to a german supplier I use for other bikes. However, after more than a month of waiting I canceled the order.

Ordered bolts lost during shipment. I do not care for money as I did not pay. But half year waiting, and still no response/actions. As I was told, the supplier sent a replacement for the lost parcel, and it lost as well. Even in the days of global covidiotism, that sounds unbelievable, considering we are talking about courier services.

Alternative search did not give results - I did not find pre-1992 bolts anywhere. If somebody is reading this and can advise a place where such bolts are available - I will appreciate it.

During this search, got the impression that all those "caferacersbuilders" do not replace bolts as maker requires. One guy replied that his motor ran just 50K km, and therefore there is no need to replace good bolts.

So, I got post-1992 bolts. They are different. And the difference is not only on the bolt head and how bolt is fixed to prevent its rotation in the conrod while tightening. The main problem - they are different in diameter (later bolts have a bigger diameter for about 0.1mm if remember correctly now), so they are not directly replaceable.
Here machining comes to help in size reduction.

Bolts comparison: pre-1992 (upper) and post-1992