Honda C110

Starting to collect too much of these😅

Picture day

It was picture day again, having to take pictures for admission to the club: http://classicracingteam.nl/

Just the bar ends aren't done yet, but I'm waiting for the material to arrive. And then after testing there will undoubtedly arise some other issues to address, but for now she's finished.

Another C110 race bike....almost done

Spent some time on the ignition last weekend, turned out the new rotor I ordered had a fault in it. When I replaced it with yet another one, it started right up and let me set the ignition.
Another step closer to finished. just waiting for the seat to come back from upholstery.

I don't blog enough

As the title says.....
But still working on stuff, just busy with a job and life and such things.

Current project, still, the second C110 race bike. And rebuilding the SS50 race bike after a slight mishap.


Changed the build to a different frame, where someone had already cut the rear end off.
Engine built with 50cc, race camshaft, race valve springs, heavy duty clutch springs and a shorter 3rd and 4th gear for 3/4 of a close ratio transmission.

Another CB50 racer almost done

My dad and I have been building another CB50 racebike, as our old ones have been sold, now being raced by friends. Even a third had been built for someone else, who also races it at the CRT. Now we've built a fourth one for my dad to race, mostly from leftovers scattered around the workshop from years of racing CB50's and plans to turn them into CR110 replicas.








Custom Tacho face, original brake and clutch levers, sand cast alloy top yoke, Chrome Honda flip-up cap


Larger 140mm rear hub


140mm SLS front hub

SS50 race bike, still shaking down

The new season has started, heck, it's almost halfway over already, and I've been busy with work, and getting the bikes running that I'm forgetting to blog about it.

Well the main focus has been on the SS50 racebike, as this is the biggest technological challenge.
Over the winter, changes have been made, footpegs were moved back, fairing was added, tachometer was changed... and changed back again.









And then the season started and a lot more changes and tweaks were made.
-Because of the footpeg relocation, the front forks needed stiffening.
-The new mechanical tachometer couldn't keep up over 13k rpm, so the electronic unit was fitted again.
-The inner rotor ignitions weren't functioning correctly, so the old outer rotor battery ignition was refitted.
-The newly made 24mm carburettor turned out to be too small, so back to the 26mm
-The new 5speed dry clutch engine wasn't delivering what it should.

The dry clutch although looking and sounding cool, was a step back in handling, this combined with the last event in Gramsbergen, where I swapped the 5-speed motor (because of strange noises) for the old 4-speed before the second heat (which also developed some strange noises after that) meant that both motors were opened up fully and examined.



As it turns out, the 4-speed motor had a better cylinder head as i had been more cautious porting the other head.
So now a new engine has been built, with the 5-speed gearbox, wet clutch and cylinder head off the other engine, combining the best bits. In a small testrun it displayed 16k rpm on the tacho, while still pulling, so I'm looking forward to the next race, to see what it actually does.

4 speed close ratio gearbox

Decided to take some gearboxes out, known for not being so good, S50 and S65, combine with a little SS50 and some more modern parts, and create another 4-speed close ratio.
Not as close as the racing gearbox, but nice for a spare racing engine, or any other future build.

13-35
18-29
21-26
23-24

when installed in a racing engine, I might even replace 1st for a 14/33 or 14/32 with long shaft for mounting a clutch.


Seen in the picture, the special tool for shimming the gearbox and checking if all the gears line up correctly, a must when combining things like this, as only the 4th gear shift drum really worked for this setup.

replica CR93 parts

So busy, and forgetting to update, so here's a quick one

Original parts were borrowed, and copied 6 times.
Replica CR93 foot rest brackets, in raw form.

clip-on's

Just finished a batch of clip-ons
Needed a set for the SS50 racebike and another for one of the CB50's that has been sold, but included in that deal was a front end swap.

A bunch of steel pipes


Some more small parts added, almost ready for brazing



after brazing, cleaning and painting


The observant viewer would notice one set missing, that was already mounted to a bike.

Some details not found in modern clip-ons are the closed ends, not with a plastic or alloy bung, but full steel construction, so that after painting, it is almost invisible how the ends were closed.
Just a single 8mm bolt, instead of 2 6mm bolts, just like original CR110 clip-ons, and other Honda's from that era.





Took a lot of work, but the result are some clip-ons that look deceptively simple and yet sophisticated at the same time.

CR lookalike

Just a preview of something I've been working on.
A Honda CB500f carburetor modified to work on a one cylinder bike and with some styling like the old CR carbs.



Still needs finishing and testing though.