KAWASAKI KH & S SERIES FORUM

MindWebs · Joined: 06 Sep 2009 Posts: 7 Location: Elmwood, WI USA

yes, i'm sure you have noticed i'm new to the site..

but not the bike..

I've had and driven my 1975 kawasaki S1c 250 for 11 years.

i have modified the appearences a bit but now i'm looking to upgrade
usefull parts, i have found this:
https://www.partsnmore.com/cat_in...0-350-400&category=electrical

BOYER BRANSDEN IGNITION
Fits S1/S1A/S1B/S1C 250/3 (72-75), KH250 A5 (76)
S2/S2A 350/3 (72-73),
S3/S3A 400/3 (74-75)

I would like to add front disk brakes, and any other safty/comfort modifications..
(I'll try and get current pic's up eventually)

Please tell me aqbout your favorite tweek to your wheels.

Thanks gents!!
108mph on a 250... gotta love the smoke...

_________________
1975 Kawy S1C 250 Triple "BioHazard"
1979 XS1100SF Special
2005 Kawy EX250 "Radioactive"
1982 Yamaha XJ750 Maxim MNS(New project)
1981 Yamaha XJ750 SECA (Basket case(project))
1972 Honda CB350 Twin, For grins....?

scouse · Posted: Thu Sep 10, 2009 9:05 am Post subject:

fit a kh250 front end (disc brake)

a z250 disc is the same diameter as the kh250 but thinner and drilled (so lighter) bolts straight on can't remeber what model

braided hose and a modern master cyclinder (think mine is an AR125)

again smaller lighter

Gary T
_________________
Ride it like you stole it

steve f · 3rd gear Joined: 09 Apr 2009 Posts: 138

what have you done to the engine to get it to do 108mph ????

simonh · Posted: Thu Sep 10, 2009 1:57 pm Post subject:

thrown it off redcar cliff

scouse · Posted: Fri Sep 11, 2009 9:21 am Post subject:

simonh · Posted: Fri Sep 11, 2009 9:33 am Post subject:

MindWebs · Joined: 06 Sep 2009 Posts: 7 Location: Elmwood, WI USA

this bike isn't made for 108mph??

ok... so i mix my own fuel..

1-1.5 yellow bottles of heat(methol alcohol)(per tank)
add a bit of 2t oil into the gas(i run full synthetic 2 stroke oil)
stock gearing, slightly oversized rear

and hang on for dear life.....
the vibration at (and over) redline will numb your hands and feet within 3 seconds.

other then that, the engine is stock... well... now that you mention it...
the PO did mention something about porting... or at least polishing the ports to be smoother flow between the ports and the intake/exhast parts..

it was alot of years ago ok..... i don't remeber exactly what he said he did. but it involved sandpaper and lots of time, i remember that much.

Hmm, KH250 front end.. the KH250-B1 1976 S1E-028801 had disk
but the KH250-A5 1976 S1E-026600 - S1F-24400 i don't think they imported them to the US after 76 because of EPA laws.. Maybe i have my years wrong.. but i wasn't aware that the US kh's had disk brakes..
I will look into this more..

Z250? i searched z250 and came up with a newer Suzuki 4 wheeler
i don't think that's what you ment Scouse.
_________________
1975 Kawy S1C 250 Triple "BioHazard"
1979 XS1100SF Special
2005 Kawy EX250 "Radioactive"
1982 Yamaha XJ750 Maxim MNS(New project)
1981 Yamaha XJ750 SECA (Basket case(project))
1972 Honda CB350 Twin, For grins....?

scouse · Posted: Fri Sep 18, 2009 6:19 am Post subject:

nope

try going up one tooth on your standard gearing, ran my 250 like that for years

Gary T
_________________
Ride it like you stole it

kas750 · 5th gear Joined: 26 Dec 2007 Posts: 836 Location: chorley

an over sized rear sprocket will gear it down!!

scouse · Posted: Fri Sep 18, 2009 6:53 am Post subject: