Topic: CB750K4 - new update 28 June 2025- tachometer troubles

[andy750]

PS When did Franken-Joe start making air-boxes?

This was a one off chrome dip on an old air box I had lying around. Been sitting on the shelf for years.


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[andy750]

I have no idea where Anders chose to ground the charging system. It might even be directly at the battery - terminal? In any case, they didn't need to be removed, and in the older pics the plug is visible unplugged and supported by the wires. You should be good to go. 

Yes....directly to the negative battery terminal.

Thanks Mike!

Got it, one lead battery term negative and other to battery positive terminal. Writing this for future ref


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[newday777]

I have no idea where Anders chose to ground the charging system. It might even be directly at the battery - terminal? In any case, they didn't need to be removed, and in the older pics the plug is visible unplugged and supported by the wires. You should be good to go. 

Yes....directly to the negative battery terminal.

Thanks Mike!

Got it, one lead battery term negative and other to battery positive terminal. Writing this for future ref


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Are they both green wires Andy?

[andy750]

I have no idea where Anders chose to ground the charging system. It might even be directly at the battery - terminal? In any case, they didn't need to be removed, and in the older pics the plug is visible unplugged and supported by the wires. You should be good to go. 

Yes....directly to the negative battery terminal.

Thanks Mike!

Got it, one lead battery term negative and other to battery positive terminal. Writing this for future ref


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Are they both green wires Andy?

Yes they are

[andy750]

Ok answered my own question with help from Ricks



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[andy750]

After a long winter, reinstall of the new stator went well, hooked up the reg/rec as described above and finally came the point of firing the bike up - first time with volt meter reading a healthy 14.4V  Will get a test ride once it stops raining!

Success!

[HondaMan]

Bravo!

[Alan F.]

Nice work Andy.

[newday777]

Excellent Andy. Gold 🌟 for you

[PeWe]

Good news, Andy
A wonderful feeling to trust the bike (or car) for a longer ride without being stranded somewhere.

[Jerry Rxman Griffin aka MuthaF'er]

After a long winter, reinstall of the new stator went well, hooked up the reg/rec as described above and finally came the point of firing the bike up - first time with volt meter reading a healthy 14.4V  Will get a test ride once it stops raining!

Success!

Great job Andy!! What rpm range did you get 14.4V?

I miss all your past riding adventures!

[MRieck]

After a long winter, reinstall of the new stator went well, hooked up the reg/rec as described above and finally came the point of firing the bike up - first time with volt meter reading a healthy 14.4V  Will get a test ride once it stops raining!

Success!

Great job Andy!! What rpm range did you get 14.4V?

I miss all your past riding adventures!

Idle

[Johnie]

Way to keep on it Andy!

[MRieck]

After a long winter, reinstall of the new stator went well, hooked up the reg/rec as described above and finally came the point of firing the bike up - first time with volt meter reading a healthy 14.4V  Will get a test ride once it stops raining!

Success!

Great job Andy!! What rpm range did you get 14.4V?

I miss all your past riding adventures!

I measured mine this afternoon and it was 14.3 V at around 1,600RPM (idle for me) Jerry.

[andy750]

Good news, Andy
A wonderful feeling to trust the bike (or car) for a longer ride without being stranded somewhere.

I completely agree!! Probably the first test ride will be a 7hr round trip to Vermont for haggis  Im hoping for this Sunday 

[andy750]

After a long winter, reinstall of the new stator went well, hooked up the reg/rec as described above and finally came the point of firing the bike up - first time with volt meter reading a healthy 14.4V  Will get a test ride once it stops raining!

Success!

Great job Andy!! What rpm range did you get 14.4V?

I miss all your past riding adventures!

Same as Mike 14.4V 

Thank you Jerry I miss them too!

[andy750]

Way to keep on it Andy!

Thanks Johnnie you are an inspiration 

[andy750]

After a long winter, reinstall of the new stator went well, hooked up the reg/rec as described above and finally came the point of firing the bike up - first time with volt meter reading a healthy 14.4V  Will get a test ride once it stops raining!

Success!

Great job Andy!! What rpm range did you get 14.4V?

I miss all your past riding adventures!

I measured mine this afternoon and it was 14.3 V at around 1,600RPM (idle for me) Jerry.

If it wasnt for Mike I wouldnt have running bikes at all 

[PeWe]

After a long winter, reinstall of the new stator went well, hooked up the reg/rec as described above and finally came the point of firing the bike up - first time with volt meter reading a healthy 14.4V  Will get a test ride once it stops raining!

Success!

Great job Andy!! What rpm range did you get 14.4V?

I miss all your past riding adventures!

I measured mine this afternoon and it was 14.3 V at around 1,600RPM (idle for me) Jerry.

If it wasnt for Mike I wouldnt have running bikes at all 

Mike has inspired and helped us to upgrade our engines!

[andy750]

Well after 96,000 miles and 51 years my tachometer has stopped working and is stuck at 4000rpm. Verified that its not the cable. Are their any easy remedies for a stuck tach?

Thanks
Andy

[newday777]

Well after 96,000 miles and 51 years my tachometer has stopped working and is stuck at 4000rpm. Verified that its not the cable. Are their any easy remedies for a stuck tach?

Thanks
Andy

We can try a dead blow hammer tomorrow!

[MRieck]

Well after 96,000 miles and 51 years my tachometer has stopped working and is stuck at 4000rpm. Verified that its not the cable. Are their any easy remedies for a stuck tach?

Thanks
Andy

I have a box of speedos and tachs brother....some have the exact "patina" of the one in the pic. I'll look tomorrow and send you pics.

[PeWe]

I have recently seen that when testing 2 sets of K2 gauges in parts before sending them to Germany for repair/restore and closing them.  (Forum member "fire113")
I'm in the process to pack all parts...

One tacho needle got stuck at a few thousands of revs direct during a ride.

- The bearing for needle shaft is worn out.
Possible to wiggle sideways. To be replaced when restoring.

The needle can move back when the gauge is held horisontal. Mine slowly did.

[andy750]

Well after 96,000 miles and 51 years my tachometer has stopped working and is stuck at 4000rpm. Verified that its not the cable. Are their any easy remedies for a stuck tach?

Thanks
Andy

I have a box of speedos and tachs brother....some have the exact "patina" of the one in the pic. I'll look tomorrow and send you pics.

Oh thank you Mike that would be great!

Looking at a couple that Stu has today - sorry will miss you this weekend! Hope to see you soon!

[andy750]

I have recently seen that when testing 2 sets of K2 gauges in parts before sending them to Germany for repair/restore and closing them.  (Forum member "fire113")
I'm in the process to pack all parts...

One tacho needle got stuck at a few thousands of revs direct during a ride.

- The bearing for needle shaft is worn out.
Possible to wiggle sideways. To be replaced when restoring.

The needle can move back when the gauge is held horisontal. Mine slowly did.

Ah this is good to know thanks Per and will def try this. Who in Germany is restoring speedos/tachs?