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Author Topic: cb750k not going passed 1st gear and neutral.Gear shifter assembly..  (Read 210 times)

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Offline Xander^

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hey guys.. yet another issue on my rebuild ..

here is a picture of the gear shifting mechanism. i took out all the linkage to see if anything was damaged, and im trying to find another spring with more springiness for the gear shift arm. but i used my had to turn it into gear and it doesnt go passed neutral very much, barely reaches second gear.. goes into 1st gear and neutral only.

1977 CB750K cafe

Offline scottly

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #1 on: February 10, 2019, 05:20:00 pm »
You have to rotate the counter-shaft back and forth while shifting.
Don't fix it if it ain't broke!
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Offline Xander^

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #2 on: February 10, 2019, 05:23:37 pm »
You have to rotate the counter-shaft back and forth while shifting.

so my shift mech isnt broken??
1977 CB750K cafe

Offline scottly

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #3 on: February 10, 2019, 05:51:02 pm »
Probably not broken, but you will need to correctly reassemble the shifting mechanism, and then see if it shifts properly with the counter-shaft rotated. The "dogs" on the gears need to be aligned with their mating slots before the trans can be shifted.     
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline Xander^

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #4 on: February 10, 2019, 06:12:40 pm »
Probably not broken, but you will need to correctly reassemble the shifting mechanism, and then see if it shifts properly with the counter-shaft rotated. The "dogs" on the gears need to be aligned with their mating slots before the trans can be shifted.   

i was assembled correctly. i tried to dry shift the gears while everything was assembled, and it wouldnt go into 2nd/3rd/4th/5th.. thats when i took it all apart to try to find out why. how do i rotate the counter shaft?just roll the bike around?
1977 CB750K cafe

Offline Xander^

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #5 on: February 11, 2019, 11:58:56 am »
Was able to get the bike down from the lift and got the kickstarter back on, couple pumps and it fixed my issue with the gear shifts!

Only thing is, id like to replace the spring on the shift lever, they seem to be discontinued and no aftermarket sites i check sell it. Also local hardware stores didnt have anything similar.. any ideas?
1977 CB750K cafe

Offline bryanj

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #6 on: February 11, 2019, 12:08:42 pm »
Which spring?
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline Xander^

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #7 on: February 11, 2019, 01:10:25 pm »
1977 CB750K cafe

Offline bryanj

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #8 on: February 11, 2019, 01:59:16 pm »
OK that isnt a very strong spring
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline Xander^

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #9 on: February 11, 2019, 02:05:25 pm »
OK that isnt a very strong spring

yeah it isnt.. but i feel like its in need of a new one. going to keep my eye out to see if i find one..
1977 CB750K cafe

Offline bryanj

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #10 on: February 11, 2019, 02:06:02 pm »
Still listed on CMSNL site.
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline Xander^

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #11 on: February 11, 2019, 05:48:58 pm »
Still listed on CMSNL site.

if this is the place youre talking about.. apparently this is the only part in the whole assembly that isnt available... lol..

https://www.cmsnl.com/products/springshift-arm_24641300000/#.XGIlv1VKiUk
1977 CB750K cafe

Offline bryanj

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Re: cb750k not going passed 1st gear and neutral.Gear shifter assembly..
« Reply #12 on: February 12, 2019, 01:16:15 am »
I just put the part number into google and found one in france and one on german ebay
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

 

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