Kawasaki H1 1971

Discussions and updates on your new bike, your new build, your wishes, wants and desires
User avatar
Skub
Posts: 14892
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 13109 times
Been thanked: 14167 times

Re: Kawasaki H1 1971

Post by Skub »

Ian wrote: Tue Aug 15, 2023 8:00 pm WTF, have you got the original surface discharge plugs too? That's taking originality to far, I'd be saving them in a drawer for posterity and putting some NGK plug caps on.
I quite like fooking up folks wireless reception. :lol:
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
User avatar
ZRX61
Posts: 8828
Joined: Tue Mar 17, 2020 4:05 pm
Location: Solar Blight Valley
Has thanked: 2222 times
Been thanked: 2593 times

Re: Kawasaki H1 1971

Post by ZRX61 »

Skub wrote: Tue Aug 15, 2023 1:41 pm Incidentally,there are folk on the bay looking a tenner for this 'rare part' and it can still be bought off Kawasaki for £1.10. Folk forget there is a surprising amount of new old stock stuff still available.


Before Mama Kaw went to CD & then online parts ordering & were still using micro fiche you could go on Ebay etc & buy the fiche for your bike for a mere $20...

They cost $2.25 from the dealer.
User avatar
Skub
Posts: 14892
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 13109 times
Been thanked: 14167 times

Re: Kawasaki H1 1971

Post by Skub »

H1 - Imgur (7).jpg
H1 - Imgur (7).jpg (3.6 MiB) Viewed 195 times
I finally got around to mechanically synchronising the carbs today.
Behold the necessary tools for the job.
H1 - Imgur (8).jpg
H1 - Imgur (8).jpg (2.76 MiB) Viewed 195 times
3 obo nails.
5.5mm drill
A split washer. (not needed)
7,8 and 10mm spanners
A couple of JIS screwdrivers
A vernier. (not really needed)

High tech gear. :lol:

The process involved firstly removing the inlet rubbers,which I had to do anyway,as the originals are cracked in places.

Since the bike idled well before I start,I took a note of the slide gap at the mouth of carb number 3 as a reference. A 5.5 drill fitted nicely.
I then backed off all 3 idle screws,so the slides sat as low as possible.
Using the throttle cable adjuster at the bars,I raised the slide until the 3/8" rod went in and out smoothly. Carbs 1&2 got the same treatment,by using the carb top adjuster.
The top adjusters were then locked and the gap re-checked. All good.

Back off the bars cable adjuster until slack,then reset the 5.5mm idle gap on all 3 carbs.

The obo nails were balanced just under the slide and sticking out the carb mouth on all 3,so I could check they all moved at the same time and using the idle screw to adjust,if necessary. As it happens,they were all dead on.

The bike started first kick,felt crisp and idled at a steady 1400ish rpm.
Last edited by Skub on Thu Oct 02, 2025 9:03 pm, edited 1 time in total.
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
User avatar
Noggin
Posts: 9994
Joined: Thu Mar 19, 2020 1:46 pm
Location: Ski Resort
Has thanked: 19270 times
Been thanked: 4903 times

Re: Kawasaki H1 1971

Post by Noggin »

I so wish I had that sort of knowledge!!!
Life is for living. Buy the shoes. Eat the cake. Ride the bikes. Just, ride the bikes!! :bblonde:
User avatar
Skub
Posts: 14892
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 13109 times
Been thanked: 14167 times

Re: Kawasaki H1 1971

Post by Skub »

Noggin wrote: Sun Aug 20, 2023 6:50 am I so wish I had that sort of knowledge!!!
Fortunately there is a very large and valuable bank of knowledge in the Kawasaki Triples Club. Everything you need to keep these old clankers going,from tutorials to folk specialising in certain areas and sites offering spares. There isn't anything an owner will encounter that these lifetime triple fanatics haven't already experienced. As owner's clubs go,it's one of the best.
http://kawatriple.com/index2.html
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
User avatar
Skub
Posts: 14892
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 13109 times
Been thanked: 14167 times

Re: Kawasaki H1 1971

Post by Skub »

This won't have helped good carburation much.....
H1 - Imgur (9).jpg
H1 - Imgur (9).jpg (2.79 MiB) Viewed 194 times
Last edited by Skub on Thu Oct 02, 2025 9:05 pm, edited 1 time in total.
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
User avatar
Druid
Posts: 1258
Joined: Mon Mar 16, 2020 7:45 pm
Has thanked: 346 times
Been thanked: 1093 times

Re: Kawasaki H1 1971

Post by Druid »

I had similar problems with my GS750, 50 year old rubber loses a bit of its flexibility. You can't get replacements for love nor money, there's sometimes good reasons for fitting pod filters :(

How easy is it to get replacements for yours?
User avatar
Skub
Posts: 14892
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 13109 times
Been thanked: 14167 times

Re: Kawasaki H1 1971

Post by Skub »

Druid wrote: Mon Aug 21, 2023 7:36 pm I had similar problems with my GS750, 50 year old rubber loses a bit of its flexibility. You can't get replacements for love nor money, there's sometimes good reasons for fitting pod filters :(

How easy is it to get replacements for yours?
Fairly easy to get them as reproduction parts,but they know how to charge. £125 for 3 rubbers was the cheapest,some were looking £150. I'm glad I didn't need any of the 5 clamps,the two big ones make the rubber look cheap!
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
User avatar
Yorick
Posts: 19759
Joined: Sat Mar 14, 2020 8:20 pm
Location: Paradise
Has thanked: 12466 times
Been thanked: 8460 times

Re: Kawasaki H1 1971

Post by Yorick »

Skub wrote: Mon Aug 21, 2023 7:45 pm
Druid wrote: Mon Aug 21, 2023 7:36 pm I had similar problems with my GS750, 50 year old rubber loses a bit of its flexibility. You can't get replacements for love nor money, there's sometimes good reasons for fitting pod filters :(

How easy is it to get replacements for yours?
Fairly easy to get them as reproduction parts,but they know how to charge. £125 for 3 rubbers was the cheapest,some were looking £150. I'm glad I didn't need any of the 5 clamps,the two big ones make the rubber look cheap!
I've got some for sale here for a tenner each. I take Paypal, No returns ;)
User avatar
mangocrazy
Posts: 8813
Joined: Tue Dec 22, 2020 9:58 pm
Has thanked: 2536 times
Been thanked: 4122 times

Re: Kawasaki H1 1971

Post by mangocrazy »

Skub wrote: Mon Aug 21, 2023 10:36 am This won't have helped good carburation much.....
Image
Depending on how far round the split goes, I reckon that could be repaired using something like CT1 hybrid polymer adhesive/filler. It sticks like sh1t to pretty much everything.
There is no cloud, just somebody else's computer.
User avatar
Skub
Posts: 14892
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 13109 times
Been thanked: 14167 times

Re: Kawasaki H1 1971

Post by Skub »

mangocrazy wrote: Mon Aug 21, 2023 10:03 pm
Skub wrote: Mon Aug 21, 2023 10:36 am This won't have helped good carburation much.....
Image
Depending on how far round the split goes, I reckon that could be repaired using something like CT1 hybrid polymer adhesive/filler. It sticks like sh1t to pretty much everything.
That's probably the worst part,shown in the pic,but there is general 'dozing' all over the three sections,so any repairs would be ongoing.

It's just too long new.
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
User avatar
mangocrazy
Posts: 8813
Joined: Tue Dec 22, 2020 9:58 pm
Has thanked: 2536 times
Been thanked: 4122 times

Re: Kawasaki H1 1971

Post by mangocrazy »

Are you going to bite the bullet and buy new/reproduction? I'd be tempted to try a repair first, especially as the part is largely out of sight.
There is no cloud, just somebody else's computer.
Le_Fromage_Grande
Posts: 12152
Joined: Mon Mar 16, 2020 6:40 pm
Location: On the road to nowhere
Has thanked: 602 times
Been thanked: 4525 times

Re: Kawasaki H1 1971

Post by Le_Fromage_Grande »

I'd just fit pod filters and go up two sizes on the main jet, three if you're feeling cautious, you might need to drop the needle a notch as well.
Honda Owner
User avatar
Skub
Posts: 14892
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 13109 times
Been thanked: 14167 times

Re: Kawasaki H1 1971

Post by Skub »

mangocrazy wrote: Tue Aug 22, 2023 6:07 pm Are you going to bite the bullet and buy new/reproduction? I'd be tempted to try a repair first, especially as the part is largely out of sight.
Bought and fitted the same time as I synced the carbs.
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
User avatar
Skub
Posts: 14892
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 13109 times
Been thanked: 14167 times

Re: Kawasaki H1 1971

Post by Skub »

Le_Fromage_Grande wrote: Tue Aug 22, 2023 9:10 pm I'd just fit pod filters and go up two sizes on the main jet, three if you're feeling cautious, you might need to drop the needle a notch as well.
The pod filters with the hard/chrome back get a bad rap,if you need to use individual filters apparently the foam thingies are better. I don't really like the look of them anyway.
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
Le_Fromage_Grande
Posts: 12152
Joined: Mon Mar 16, 2020 6:40 pm
Location: On the road to nowhere
Has thanked: 602 times
Been thanked: 4525 times

Re: Kawasaki H1 1971

Post by Le_Fromage_Grande »

Skub wrote: Tue Aug 22, 2023 9:20 pm
Le_Fromage_Grande wrote: Tue Aug 22, 2023 9:10 pm I'd just fit pod filters and go up two sizes on the main jet, three if you're feeling cautious, you might need to drop the needle a notch as well.
The pod filters with the hard/chrome back get a bad rap,if you need to use individual filters apparently the foam thingies are better. I don't really like the look of them anyway.
Never had any problems with K&N or S&B filters with the chrome ends, the cheap ones may be different, I've had a foam filter get sucked into a carb. They're an arse to get working well with CV carbs, they're fine with slide carbs so long as you put a bit of effort in getting them jetted correctly, but I do know a man who knows how to get them working with CV carbs.
Honda Owner
User avatar
Skub
Posts: 14892
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 13109 times
Been thanked: 14167 times

Re: Kawasaki H1 1971

Post by Skub »

Before and after pics.

Old fuel tap.
H1 - Imgur (5).jpg
H1 - Imgur (5).jpg (4.9 MiB) Viewed 193 times

Revamped fuel tap,now with an off position instead of prime.
20230823_112152.jpg
20230823_112152.jpg (4.44 MiB) Viewed 193 times
Last edited by Skub on Thu Oct 02, 2025 9:08 pm, edited 1 time in total.
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
User avatar
Skub
Posts: 14892
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 13109 times
Been thanked: 14167 times

Re: Kawasaki H1 1971

Post by Skub »

I think I've discovered a foolproof way of going slower,yet still enjoying the ride.

1. Shit brakes.

2. Reduced ground clearance + not wanting to scrape the shiny chrome trying.

It's all about the aural experience,baby. 8-) :lol:
2024-04-19__17.49.02.jpeg
2024-04-19__17.49.02.jpeg (4.78 MiB) Viewed 192 times
In other news,all the carb sorting n' schitt means the bike is running just lovely.
Last edited by Skub on Thu Oct 02, 2025 9:13 pm, edited 1 time in total.
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
User avatar
Skub
Posts: 14892
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 13109 times
Been thanked: 14167 times

Re: Kawasaki H1 1971

Post by Skub »

I got a reminder of a perfect day out on Tuesday,a notice of intended prosecution for 50 in a 30. That took the shine off the day. :lol:
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
JackyJoll
Posts: 4434
Joined: Sun May 03, 2020 10:11 pm
Has thanked: 245 times
Been thanked: 1224 times
Contact:

Re: Kawasaki H1 1971

Post by JackyJoll »

Marks off for failing to double the limit.
Post Reply