revtothelimit - motorbike forum

This is the bike I, and my brother, learnt to ride on.

I was 9 when we received it for Christmas in 1982, 40 years ago.

We rode it at every opportunity, around the garden, in the woods, jumps, drops, spinning the rear on the gravel.

I can't remember how long we used it, several years certainly, but eventually it just "stopped running", and no-one could get it running.

Every since it's languished in the bike stores, but i intend to have a go at getting it going. If i can't get it running i fully intend to mount it in the front room!

The other project is also in that photo..... The JAPton is finally here.
Theoretically the JAPton is ready to run, apart from the kickstarter which fell off last time i tried to start it. But it also needs some tweaking.

I'm really looking forward to spending time on these bikes and i just hope that i can get some life out of them again.

More (better!) photos will follow obviously!

Good stuff

A squirt of something flammable down the inlet of the Puch and kick it over a few times. If it coughs then the problem isn't electrical.

cheb wrote: Sun Dec 11, 2022 5:27 pm A squirt of something flammable down the inlet of the Puch and kick it over a few times. If it coughs then the problem isn't electrical.

It's been tinkered with by some of the best tinkerers we knew, all to no avail. Personally i think the exhaust has choked up.

First job will tidying up some of the rust and sourcing a workshop manual along with fresh ATF before attempting a start.

The Japton is a fine looking utensil.

Rockburner wrote: Sat Dec 10, 2022 9:04 pm IMG_20221210_135754_469.jpg
This is the bike I, and my brother, learnt to ride on.

I was 9 when we received it for Christmas in 1982, 40 years ago.

We rode it at every opportunity, around the garden, in the woods, jumps, drops, spinning the rear on the gravel.

I can't remember how long we used it, several years certainly, but eventually it just "stopped running", and no-one could get it running.

Every since it's languished in the bike stores, but i intend to have a go at getting it going. If i can't get it running i fully intend to mount it in the front room!

The other project is also in that photo..... The JAPton is finally here.

IMG_20221210_135705_493.jpg

Theoretically the JAPton is ready to run, apart from the kickstarter which fell off last time i tried to start it. But it also needs some tweaking.

I'm really looking forward to spending time on these bikes and i just hope that i can get some life out of them again.

More (better!) photos will follow obviously!

On the Puch, left fork leg - is that the speedo?

Beancounter wrote: Mon Dec 12, 2022 1:19 pm

Rockburner wrote: Sat Dec 10, 2022 9:04 pm IMG_20221210_135754_469.jpg
This is the bike I, and my brother, learnt to ride on.

I was 9 when we received it for Christmas in 1982, 40 years ago.

We rode it at every opportunity, around the garden, in the woods, jumps, drops, spinning the rear on the gravel.

I can't remember how long we used it, several years certainly, but eventually it just "stopped running", and no-one could get it running.

Every since it's languished in the bike stores, but i intend to have a go at getting it going. If i can't get it running i fully intend to mount it in the front room!

The other project is also in that photo..... The JAPton is finally here.

IMG_20221210_135705_493.jpg

Theoretically the JAPton is ready to run, apart from the kickstarter which fell off last time i tried to start it. But it also needs some tweaking.

I'm really looking forward to spending time on these bikes and i just hope that i can get some life out of them again.

More (better!) photos will follow obviously!

On the Puch, left fork leg - is that the speedo?

Yep.

Rockburner wrote: Sun Jan 01, 2023 7:35 pm

Screwdriver wrote: Sun Jan 01, 2023 7:16 pm Crank seals the most likely culprit….

You'll have to explain that further.....

Its a JAP speedway style 4-stroke single.

Errr ... might the Puch have such seals?

Horse wrote: Sun Jan 01, 2023 8:37 pm

Rockburner wrote: Sun Jan 01, 2023 7:35 pm

Screwdriver wrote: Sun Jan 01, 2023 7:16 pm Crank seals the most likely culprit….

You'll have to explain that further.....

Its a JAP speedway style 4-stroke single.

Errr ... might the Puch have such seals?

Very probably.....

Given the location of Screwd's post, timing, and lack of any other clue, I assumed he was talking about the bike discussed in the post above his......

But I'll take responsibility for not actually stating clearly that my post this evening was about the JAPton.

I’ve just spotted this thread, I also got a puch for Xmas in 1982,had it for a year before moving onto a ty80. My uncle bought the ouch and took it back to Holland in the car boot for my cousin, I believe it’s still in one of the farm sheds somewhere there.

The foam air filter on the Puch wasn't very happy though!

Rockburner wrote: Tue Jun 06, 2023 6:56 pm The foam air filter on the Puch wasn't very happy though!

IMG_20230606_175507_222~2.jpg

Have you tried starting it while the filter was like that?

I'd been hoping you'd get on to the Puch. No offence intended!

ChrisW wrote: Tue Jun 06, 2023 7:36 pm I'd been hoping you'd get on to the Puch. No offence intended!

I've been busy.....

Count Steer wrote: Tue Jun 06, 2023 7:22 pm

Rockburner wrote: Tue Jun 06, 2023 6:56 pm The foam air filter on the Puch wasn't very happy though!

IMG_20230606_175507_222~2.jpg

Have you tried starting it while the filter was like that?

Possibly, but it's not had fuel in it for some years.... Probably over 20....

Well, the sparks haven't run out yet!

Had an hour or two yesterday so tinkered with the Puch.



Definitely needing a new fuel tap....

Tank is currently full of citric acid to eat the rust and I'm going to wash some ACF50 round it afterwards to keep it from getting bad again while i sort out the carb. Should be fine, its a 2-smoke!

While tinkering i stripped the "air box" and discovered its still got the restrictor plate in. Will leave that until its fully working and then see if we want to unleash the full potential!

I also put the pressure tester on it just to see if there was any compression at all... 30psi. Not a lot, but its only a 50cc, so we'll see.... I want to at least try it with fuel in before i strip it any further.

Also ordered up some oil and ATF (for the gearbox) from Westway Oils, so, along with the carb repair kit and ultrasonic cleaner that are en-route, there is progress being made.


The JAPton is waiting for the ultrasonic as well, and I have a repair kit for the Monobloc ready and waiting, so looking forward to seeing if that makes a difference. I have also tinkered a bit with the valve gaps and i think they're better than they were!

Emptied the citric acid from the Puch tank today, seems to have loosened a lot of crap! Washed the tank out as best I can, and there's an inline filter on the way with the new tap to catch anything left.

I also whipped off the exhaust and discovered its in good shape, i thought it might be coked up solid, but its fine. Flushed it through with the citric acid anyway and rinsed it out before liberally soaking it with WD40. It'll smoke like crazy for a bit but should be fine once the bike is running.

Also find some RTV in my box of stuff, so going to use that on the JAPton covers to try to reduce the oil escape!

The Ultrasonic cleaner just turned up, so once the cleaning solution arrives I'll get the carbs done and see if anything will fire up!

Rockburner wrote: Sun Jun 18, 2023 2:20 pm Emptied the citric acid from the Puch tank today, seems to have loosened a lot of crap! Washed the tank out as best I can, and there's an inline filter on the way with the new tap to catch anything left.

I also whipped off the exhaust and discovered its in good shape, i thought it might be coked up solid, but its fine. Flushed it through with the citric acid anyway and rinsed it out before liberally soaking it with WD40. It'll smoke like crazy for a bit but should be fine once the bike is running.

Also find some RTV in my box of stuff, so going to use that on the JAPton covers to try to reduce the oil escape!

The Ultrasonic cleaner just turned up, so once the cleaning solution arrives I'll get the carbs done and see if anything will fire up!

I do like an optimist.

Puch carb parts, after a clean.

JAP carb parts, before:


And after!