who's been having to add transmission fluid?
#1821
10-04-2017, 03:53 PM
Supporter
I would think that would be fairly cost effective to try... Steve Cole, is that within the realm of possibilities?
#1822
10-04-2017, 03:55 PM
Supporter
To vent the crankcase if you want to maintain some vacuum you would have to use a check valve that released at a certain pressure. I imagine that it could solve the transfer problem and maybe the sumping problem. I still think the final solution to the transfer problem may be to vent the primary. I think a vent on the backside of the inner primary running to the top cover of the transmission could work.
#1823
10-04-2017, 04:04 PM
I've watched this thread with great interest. I have not experienced any transfer on my M8 Tri Glide, but due to this thread I do now keep an eye on it.
Some have said that there were a few 2016 bikes that had the transfer issue. When did the narrow primary come into play? Just spit balling, but could the reduced area cause this? Looking into the primary from the derby cover the clutch hub area is different since they went to the hydraulic clutch. What else in the primary changed? Like stated above, venting the primary would be an easy check, especially for those who have access to a dyno. Again, just spit balling since nothing else seems to have cured the problem.
Some have said that there were a few 2016 bikes that had the transfer issue. When did the narrow primary come into play? Just spit balling, but could the reduced area cause this? Looking into the primary from the derby cover the clutch hub area is different since they went to the hydraulic clutch. What else in the primary changed? Like stated above, venting the primary would be an easy check, especially for those who have access to a dyno. Again, just spit balling since nothing else seems to have cured the problem.
#1824
10-04-2017, 04:27 PM
Supporter
I've watched this thread with great interest. I have not experienced any transfer on my M8 Tri Glide, but due to this thread I do now keep an eye on it.
Some have said that there were a few 2016 bikes that had the transfer issue. When did the narrow primary come into play? Just spit balling, but could the reduced area cause this? Looking into the primary from the derby cover the clutch hub area is different since they went to the hydraulic clutch. What else in the primary changed? Like stated above, venting the primary would be an easy check, especially for those who have access to a dyno. Again, just spit balling since nothing else seems to have cured the problem.
Some have said that there were a few 2016 bikes that had the transfer issue. When did the narrow primary come into play? Just spit balling, but could the reduced area cause this? Looking into the primary from the derby cover the clutch hub area is different since they went to the hydraulic clutch. What else in the primary changed? Like stated above, venting the primary would be an easy check, especially for those who have access to a dyno. Again, just spit balling since nothing else seems to have cured the problem.
#1825
10-04-2017, 04:33 PM
Club Member
Using a derby cover to check this could work, but there won't be any old derby covers, it is a new part for 2017. I don't imagine there are very many of these laying around.
#1826
10-04-2017, 04:52 PM
Supporter
That would work. Probably harder to install than a temporary vent into the derby cover. If the derby cover vent worked, I'd want to try this.
#1827
10-04-2017, 05:18 PM
People are always buying 'themed' H-D Derby Covers so there may be a few to be had..
#1828
10-04-2017, 05:25 PM
#1830
10-05-2017, 03:06 AM
Road Master
My Questions up to now.
What will happen, if the transmission vent hose from the top of the transmission cover is directly connected to the top of the inner primary housing? The pressure/vacuum should be identical in both cases. Right?
If yes, the sucking of oil over the mainshaft may stop?
What will happen, if the transmission vent hose from the top of the transmission cover is directly connected to the top of the inner primary housing? The pressure/vacuum should be identical in both cases. Right?
If yes, the sucking of oil over the mainshaft may stop?
Last edited by FM500; 10-05-2017 at 06:31 AM.