GT380 Gear Change

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Woodpecker
Posts: 25
Joined: Tue Oct 29, 2019 12:11 pm
Location: Rainham Kent

GT380 Gear Change

Postby Woodpecker » Sun Jan 12, 2020 4:12 pm

Hi all I have just completed a complete refurbishment of a 1972 J which has not been n the road formore than 20 years having never worked on one of these before I have had a few problems getting it running. The first outing on the road was very good, the engine was smooth and the bike felt great. The only issue (i hope) is the gear change. During the rebuild I checked the gears and all 6 engaged but on the road Changing down is difficult and requires up and down action on the change to get the gears. When static there is a lot of up and down play in the lever about 40mm. Any ideas of whats wrong?

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malky
Posts: 951
Joined: Sat Dec 19, 2009 3:25 pm
Location: swansea south wales

Re: GT380 Gear Change

Postby malky » Sun Jan 12, 2020 8:55 pm

Did you make sure that the two legs on the gear shaft return spring were fitted each side of the pin - it's quite easy to dislodge it as the shaft is quite a loose fit

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itsnotateapot
Posts: 961
Joined: Thu Feb 16, 2012 10:09 pm
Location: Sheffield, South Yorkshire

Re: GT380 Gear Change

Postby itsnotateapot » Sun Jan 12, 2020 9:08 pm

malky wrote:Did you make sure that the two legs on the gear shaft return spring were fitted each side of the pin - it's quite easy to dislodge it as the shaft is quite a loose fit

totally agree
SUZUKI GT750 L 8-)
SUZUKI T500 M 8-)
SUZUKI GT185 K 8-)
Suzuki T500 Cobra 8-) 8-)

Woodpecker
Posts: 25
Joined: Tue Oct 29, 2019 12:11 pm
Location: Rainham Kent

Re: GT380 Gear Change

Postby Woodpecker » Sun Jan 12, 2020 9:51 pm

Thanks I was thinking it may be the return spring not fitted correctly as there is no spring action on the gear pedal. So it looks like side cover off to investigate !

Woodpecker
Posts: 25
Joined: Tue Oct 29, 2019 12:11 pm
Location: Rainham Kent

Re: GT380 Gear Change

Postby Woodpecker » Tue Jan 14, 2020 9:22 am

I have removed the side cover and the spring is located corectly but does not have much spring action. I have another set of gears from a later 380 and the spring is slightly different the fork ends closer together so I have fitted this. This is my only 380 and i'm not sure what to expect I thought the change would be more switch like.
Thanks for any advice Stu

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canaletto5
Posts: 4560
Joined: Tue Jul 23, 2013 8:43 pm
Location: Derbyshire

Re: GT380 Gear Change

Postby canaletto5 » Tue Jan 14, 2020 9:42 am

Woodpecker wrote:I have removed the side cover and the spring is located corectly but does not have much spring action. I have another set of gears from a later 380 and the spring is slightly different the fork ends closer together so I have fitted this. This is my only 380 and i'm not sure what to expect I thought the change would be more switch like.
Thanks for any advice Stu
I think it possibke that the spring isn't fitted on the gear shaft correctly. You have to cross over the fork ends as they are fitted over the locating peg so there is tension in them; Kev

Woodpecker
Posts: 25
Joined: Tue Oct 29, 2019 12:11 pm
Location: Rainham Kent

Re: GT380 Gear Change

Postby Woodpecker » Tue Jan 14, 2020 1:07 pm

Spot on Kev as you said the spring has to be pre tensioned when fitted to the change shaft, all gears appear much easier now! need some better weather for a road test. The Haynes manual is pretty poor on the 380/550.
Thanks Stu


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