Category Archives: Motorbikes

Kreidler RS 5 speed – engine

I bought the cheapest 5 speed engine i could find, it’s in a rough state but should work after a restauration. It’s had a hard life since 1967, maybe as a motocross engine?

RS Engine

I will rebuild everything, a bit of aluminium welding, thread repairs, flattening the mating surfaces, new bearings, seals, crankshaft etc.

The setup will be a 6,25 HP replica, 40 mm cylinder, 20 mm Bing, 32 mm cigar exhaust.

Lets see the progress so far, remember to look for picture comments and check back for more updates in the future.

Kreidler RS 5 speed – frame

Say hi to my latest restoration project. I got a 3 speed Kreidler RMC from my brother, when i found a 5 speed engine i decided to convert and register it as a motorcycle. So it will become a RS model with a 6,25 HP setup. This should be good for 85 km/h, and the police can’t do anything about me riding more than 30 km/h 😉

I will try to reuse as many parts as possible, and keep a bit of patina. I like to use my bikes and not to worry about scratches. So i’m spending many hours with cleaning, bending and buffing.

I’m also swapping the 6V points ignition to a Kokusan 12V CDI model, more on that later.

Lets see the progress so far, remember to look for picture comments and check back for more updates in the future.

YX140 engine

I finally had time to upgrade my Gorilla engine. I swapped the old 8,5 HP 125 ccm engine to a YX 140 ccm with 14 HP. I also upgraded the exhaust to a NHRC upswept carbon model, a Molkt 24 mm carburettor and a lightweight 540g ignition system with better power for the charging system.

Check my gallery on this build, some pictures have further description.

 

Here is a video of my test ride. I still need to jet the carburettor a bit leaner, and i will mount a bit larger front sprocket. The topspeed is a bit over 100 km/h on a GPS now.