64 CB77 Clutch and shift shaft question

joep · Post by **joep** » Sun Dec 09, 2018 2:31 pm

Just pulling apart my newest 64 ' CB77 project , clutch plates were stuck together and they appear to be early Barnett types. The base plate at the bottom of the center clutch hub has " Huntington Park " and " BTE " cast into the plate or spacer as the clutch has only 5 friction plates and 4 steel with the thick spacer at the bottom of the stack . A couple questions I have is if this is an older Barnett clutch spacer is it compatible with their newer plates ? Second question is that I noticed that the shift spindle shaft has a 14mm ID x 1mm thick thrust washer on the shift spindle shaft between the clutch cover and the shaft , I did not see that washer on the parts schematic , does that washer belong there as there is no end play on the shift spindle when the washer is installed .
Thanks in Advance !

G-Man · Post by **G-Man** » Sun Dec 30, 2018 4:53 am

I'm not familiar with Barnet clutch parts so cannot help with that. The thrust washer sounds like an addition by a previous owner. It may be the one from the oil pump shaft......

G

joep wrote:Just pulling apart my newest 64 ' CB77 project , clutch plates were stuck together and they appear to be early Barnett types. The base plate at the bottom of the center clutch hub has " Huntington Park " and " BTE " cast into the plate or spacer as the clutch has only 5 friction plates and 4 steel with the thick spacer at the bottom of the stack . A couple questions I have is if this is an older Barnett clutch spacer is it compatible with their newer plates ? Second question is that I noticed that the shift spindle shaft has a 14mm ID x 1mm thick thrust washer on the shift spindle shaft between the clutch cover and the shaft , I did not see that washer on the parts schematic , does that washer belong there as there is no end play on the shift spindle when the washer is installed .
Thanks in Advance !

joep · Post by **joep** » Sun Dec 30, 2018 12:11 pm

After doing some detective work I found that the washer that was on the shift shaft came from the top of the primary chain tensioner spring ( as shown in the parts schematic ) , someone though it belonged on the shift shaft not the top of the tensioner spring , not only was it hanging up the shift shaft is also was dragging on one of the clutch friction plates . The oil filter thrust washer was still in place on the outside of the filter , but your right about that being a possibility as the oil filter thrust washer also has a 14mm I D also . There is a reason Honda made that shift shaft flat on top so it wound not contact the clutch .

: > )

G-Man · Post by **G-Man** » Mon Dec 31, 2018 2:29 am

Joep

Great detective work.

G

joep wrote:After doing some detective work I found that the washer that was on the shift shaft came from the top of the primary chain tensioner spring ( as shown in the parts schematic ) , someone though it belonged on the shift shaft not the top of the tensioner spring , not only was it hanging up the shift shaft is also was dragging on one of the clutch friction plates . The oil filter thrust washer was still in place on the outside of the filter , but your right about that being a possibility as the oil filter thrust washer also has a 14mm I D also . There is a reason Honda made that shift shaft flat on top so it wound not contact the clutch .

: > )

LOUD MOUSE · Post by **LOUD MOUSE** » Sun Jan 06, 2019 4:27 pm

Not sure this will help do to the date of your message.
That is a BARNETT plate and is made of magnesium.
Over the years I've been rebuilding these engines I gathered 5 Barnett clutches and every first plate was warped from the spring pressure bending it over the tabs which are on the center hub.
I ordered a Barnett clutch and it came with the disc made with aluminum stamped out of sheet aluminum. ......................lm

joep wrote:Just pulling apart my newest 64 ' CB77 project , clutch plates were stuck together and they appear to be early Barnett types. The base plate at the bottom of the center clutch hub has " Huntington Park " and " BTE " cast into the plate or spacer as the clutch has only 5 friction plates and 4 steel with the thick spacer at the bottom of the stack . A couple questions I have is if this is an older Barnett clutch spacer is it compatible with their newer plates ? Second question is that I noticed that the shift spindle shaft has a 14mm ID x 1mm thick thrust washer on the shift spindle shaft between the clutch cover and the shaft , I did not see that washer on the parts schematic , does that washer belong there as there is no end play on the shift spindle when the washer is installed .
Thanks in Advance !

joep · Post by **joep** » Sun Jan 06, 2019 5:06 pm

Spoke to Barnett and that thick base plate made of Magnesium is dates back to pre-1965 when they were located in Huntington Park before the move to the current Ventura , Ca location. The friction plates were the oldies as well , I am working with them on using their new plates and springs .

joep · Post by **joep** » Thu Jan 10, 2019 11:58 pm

Been reading thru many posts on clutch info , Loud Mouse had a good description on the 3 waves of clutch plate configurations and different clutch centers ect , I could not find in my Honda shop manual the spec on the steel plate thickness either A or B types , does anyone have the thicker base plate spec used later on and the spec on the remaining steels ? I have many new steels in many different thickness to work with , trying to get a good grip without having to have the hands of a monster to pull the lever in . I am going to try to a thick steel base plate 2.60 mm and then alternate with the 5 frictions and steels but much thinner on the remaining steels.

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