Project 60
This project is called 60 because it is my intention to have the engine develop 60 bhp next season. I won't use the current engine for that but will be using the engine
from the street bike. That engine is not very sound and that way I kill 2 birds with
one stone because I only have to open 1 engine in order to get 2 healthy engines.
Bodywork and subframe from the street bike are transplanted too because that subframe
is lighter and the coulor yellow is much faster than blue.
For me this is the first time that I do this kind of work on the engine and I am very happy that I get help from Arlan. He has been doing a lot of wrenching on the HTS supermono racer and his own Yamaha SZR supermono racer.
These things have to be done:
- 100,6 or 101 mm bore
- High compression piston
- Stage 1 camshaft
- Flow head
- New crankshaft bearings
- New big-end bearings
5 November 2006
Drained the oil and removed these parts:: bodywork, oil tank and muffler.
12 november 2006
Drained the coolant and removed these parts: radiator and hoses, front sprocket,
carburettors and header pipes.
Enough undressed to remove the engine.
25 november 2006
Separated the engine from the frame.
26 november 2006
Start of the disassembly of the engine.
2 December 2006
Removed clutch cover, generator cover and clutch.
Loosened the flywheel nut, removed the crankshaft gear and balancer gear with
help the of Koerhuis Motoren.
9 December 2006
Removed the flywheel with a home made flywheel puller en the help
of Koerhuis Motoren.
12 December 2006
Separated the crank case halves
15 December 2006
Removed the last of the 'major' obstacles, the crank shaft.
15 December 2006
brought the cilinder head away so the inlet ports can be enlarged.
11 January 2007
Dropped the crankshaft and cilinder off at Arlans (he will bring them to Marco Winkelaar).
20 januari 2007
I've put the engine of the track bike in the street bike.
04 February 2007
Stage 1 camshaft and JE 101mm piston have arrived
16 februari 2007
The cilinder is ready, bored and honed by Peters in Epse.
18 februari 2007
The street bike is finished, I took it for a spin this afternoon :-)
Cylinder, piston and camshaft have been fitted, only a valve check/adjust and the engine is ready to go back in the chassis.
24 february 2007
The race-engine is mounted in the race-chassis.
03 march 2007
The race-blok ran for the first time today. It fired up fairly easy.
07 apr 2007
Was it all worth it? Yes! 56 hp at the rear wheel. With an estimated 12% transmissionloss that means 64 hp at the crankshaft. Compared to the stock 48 hp that is an increase of 33%. In the chart below the green line corresponds to a testrun with a BSM Future Large silencer with dB-killer, the red lines correspond with a run with an open Remus Sport exhaust from the Dutch MuZ Cup. Louder but less powerful.
08 apr 2007
Ready for the first race next thursday 12 april.
I thank the following persons and companies for helping me with this project:
Arlan Holterman
Willem Koerhuis Motoren
Marco Winkelaar
Robert Kleinherenbrink
Peters Motorenrevisie
Racesticker.nl
(c) MR Racing - software version 2.14 - 05 January 2019.