Welcome,
Guest
. Please
login
or
register
.
Did you miss your
activation email
?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
News:
SMF - Just Installed!
Home
Help
Search
Login
Register
Thumper Club Forum
»
Technical
»
Bike Problems/Questions
»
gn400 revs
« previous
next »
Print
Pages: [
1
]
Author
Topic: gn400 revs (Read 479 times)
spooky
Posts: 1067
Sunny Dumfries
gn400 revs
«
on:
December 29, 2018, 12:15:14 PM »
Right, gn400 that i just got starts easily, but when i ride it, it runs ok ish to 4000rpm then everything happens and it goes like billyo, before i look at anything, is it likely to be fuel or ignition, ? any suggestions
Logged
Classic efi squadron blue, CG125, Terrot 125, CM200 sprinter,
themoudie
Full Member
Posts: 4661
Re: gn400 revs
«
Reply #1 on:
December 29, 2018, 02:43:55 PM »
Aye Rufus,
IMHO have a look at the air filter and then the carb, sounds as though either the air filter and or the pilot jet and maybe the needle jet are gummed up or partially obstructed. A new iridium spark plug wouldn't do any harm either, if you can stretch to it. All the best and good health.
My regards, Bill
Logged
spooky
Posts: 1067
Sunny Dumfries
Re: gn400 revs
«
Reply #2 on:
December 29, 2018, 02:52:54 PM »
thanks bill, cleaned air filter, it was a bit dirty, think it`s time to take carb of and give it a bath, plug looks ok, maybe santa can afford an iridium plug when he gets paid.. the bike hadn`t run since 1996 so carb probably is the culprit.
Logged
Classic efi squadron blue, CG125, Terrot 125, CM200 sprinter,
johnr
Regular
Full Member
Posts: 1373
Re: gn400 revs
«
Reply #3 on:
December 31, 2018, 01:45:06 AM »
gn400 ignition is fixed with no mechanical advance retard unit, so it either runs or it doesnt. the sp engine of which this is a derivative has points on the head with a mechanical adv ret unit, but the gn doesnt, meaning that youre looking at the carb. assuming the fuel is fresh and its got a decent spark plug, id give the carb a strip and clean first before altering anything.
i had a gn engine in a little trail bike frame once, and i fitted the flatslide cv carb off a klr600 to it. the bloody thing went likee a scalded cat afterwards!
Logged
johnr
Regular
Full Member
Posts: 1373
Re: gn400 revs
«
Reply #4 on:
January 02, 2019, 04:42:36 PM »
just thought id mention. theres a gn400 just come up for sale on ebay, its listed as a barn find and looks pretty grotty, but its all thre. at thee moment its at 250 quid and is in clitheroe.
Logged
spooky
Posts: 1067
Sunny Dumfries
Re: gn400 revs
«
Reply #5 on:
January 02, 2019, 05:11:13 PM »
Thanks John spotted that and Bill sent me a link as well..
Logged
Classic efi squadron blue, CG125, Terrot 125, CM200 sprinter,
johnr
Regular
Full Member
Posts: 1373
Re: gn400 revs
«
Reply #6 on:
January 02, 2019, 05:59:16 PM »
well its not a million miles from me so if you need someone to pick it up and store it whilst you sort transport, im only a few miles away.
Logged
Print
Pages: [
1
]
« previous
next »
Thumper Club Forum
»
Technical
»
Bike Problems/Questions
»
gn400 revs