moving64's pk engine

[henri]

having picked up a pk project,movin brought the engine to me to build .arrived as bought,in bits in a box ,with primary loose in cases an tree an clutch centre still assembled in clutch side . i thought the bearing was missing an they where just loosely reassembled for storage . unfortunately not , the circlip retaining ring was no longer attached .IMG_2588 by henri briggs, on Flickr   .
big problem , so i asked around for replacement cases ,but with no joy .so no choice but to attempt a repair on these cases ,1st step refit a good straight circlip .then out with a end mill cutter an level the area ,leaving the one part circlip groove was there .IMG_2601 by henri briggs, on Flickr    .
then start to drill an tap a series of M3 holes around the circumference .IMG_2602 by henri briggs, on Flickr    .
whilst making up a rough pattern in ali sheet ,too later be copied into 1.5mm steel sheet .IMG_2603 by henri briggs, on Flickr     .
which will later be held down by countersunk machine screws thread locked into place for security . as its having straight cut not helical primarys ,so no lateral load in use . that should keep the circlip an bearing located in place ,wether it will survive any future removals of primarys is anybodys guess .if bearings heated on inner race before attempting to remove primary i reckon it should .H

[movin64]

Fingers crossed it holds up for years, well until I can save for some new cases 👍

[henri]

an after a afternoons bodgery in my play pen we have something .IMG_2647 by henri briggs, on Flickr .
just tidy up the steel plate an temper it to hold an its going to work . thinking spring-steel temper ,which if memory serves is heat til purple then plunge into a oil bath . best check my textbooks to be sure 1st .H

[henri]

so it wa on with the build ,an bottom end put together ,trial fit of barrel to alter top of inlet so they didnt touch/interfere .IMG_2653 by henri briggs, on Flickr .
newfren 4 plate clutch set up with polini wave spring in ,IMG_2655 by henri briggs, on Flickr .
then the top end on an a few other little bits .IMG_2656 by henri briggs, on Flickr .
too discover my previously altered/lightened fly is not going to fit ,rubs on the barrel transfer .IMG_2657 by henri briggs, on Flickr .
so 5 minutes with a sanding disc in the grinder ,a few trial fits ,an its done .IMG_2660 by henri briggs, on Flickr .
an we have a spark , now to swap the jets an atomiser/needle in the YSN 24mm phbl carb for genuine dell items ,an in the stand it goes.IMG_2664 by henri briggs, on Flickr .
fit the VMC "fifty" exhaust an its ready to start .IMG_2652 (1) by henri briggs, on Flickr .
always a fun time , an a 3rd kick starter .IMG_2697 by henri briggs, on Flickr .