1984 V45 Honda Sabre (750cc)
in [Motorcycles Tips]
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From: Ian Singer on 12 Aug 2008 23:46 Couple of hints please on bike I just bought. 1. I was told that under hard acceleration in second gear it kind of skips. I thought they maybe meant the clutch slipped but they said no it kind of speeds up goes clunk and seems like it skips a tooth. Any ideas? I though it may have been because it was running synthetic oil so changed to Castrol 10-30 this morning and yes it still is doing it, about three times in a 20 mine ride where I never got about 5,000 RPM. 2. There is a digital display on right side of instrument cluster that is temp gauge and gas gauge. Display is totally dead but I have low gas warning light on and haven't had chance to see if the sender is still plugged in. In the main wiring bundle that goes from front to back under the gas tank, the orange and green wires were broken so I fixed them but no change. I pulled the instrument cluster and nothing obvious. Previous owner thought a defective PCB but I am dubious. 3. The main odometer underneath the instrument cluster is not working, but the speedo, tach and trip meter are, and presumably the signal is coming from same place. Also the turn signal cancelling works so either the distance/speed sender or tilt sensor work. The Haynes manual does not list a 1984 that is 750cc as the US model was switched to 700cc. This is Canadian model which was not so I am not sure about the wiring diagram. This is unit that has only one CDI unit. It says the orange wire is for the front winker but front running lights and turn signals work. I have not checked to see if they are dual filament bulbs. There is an orange wire in headlight case that is not hooked up and a gray one that is spliced to the other orange one. The bike is stock except for Hondaline backrest, top end oil mod, steel brake line and fan switch. Front shock seals were replaced, prolink shock may have been upgraded and grease nipples were added. It is also running radials which are supposed to make it much more responsive. Also apparently the clutch basket was swapped for another one to see if it got rid of the problem. It did not so previous owner did not wind it out in second. I adjusted rear brake freeplay with the adjust screw on linkage and now the rear brake squeals like a train with emergency braking. I am hoping that it is because it was sitting for two moths and it just needs to get the dust out. Ian Singer PS if you want 81 Suzuki GS650GLX, 82 Kawasaki KZ750-R1, or 1983 Suzuki GS650GLD I have them all for sale. -- ========================================================================= See my homepage at http://www.iansinger.com hosted on http://www.1and1.com/?k_id=10623894 All genealogy is stored in TMG from http://www.whollygenes.com Charts and searching using TNG from http://www.tngsitebuilding.com I am near Toronto Canada, can I tell where you are from your reply? =========================================================================
From: Ian Singer on 12 Aug 2008 23:51 Ian Singer wrote: > Couple of hints please on bike I just bought. I forgot a point. Cam chains appear noisy but quieten down at speed. As they are self adjusting I guess that means a teardown. If they are really bad and slip will one or more of the four valves hit a piston. Ian Singer -- ========================================================================= See my homepage at http://www.iansinger.com hosted on http://www.1and1.com/?k_id=10623894 All genealogy is stored in TMG from http://www.whollygenes.com Charts and searching using TNG from http://www.tngsitebuilding.com I am near Toronto Canada, can I tell where you are from your reply? =========================================================================
From: ~ on 13 Aug 2008 00:16 On Aug 12, 8:46�pm, Ian Singer <iansin...(a)sympatico.ca> wrote: > 1. �I was told that under hard acceleration in second gear it kind of > skips. I thought they maybe meant the clutch slipped but they said no it > kind of speeds up goes clunk and seems like it skips a tooth. Any ideas? > � I though it may have been because it was running synthetic oil so > changed to Castrol 10-30 this morning and yes it still is doing it, > about three times in a 20 mine ride where I never got about 5,000 RPM. It's impossible for the gear to "skip a tooth" because it's a constant mesh transmission with five pairs of gears that are *always* meshed together, and *always* turning when the motorcycle is moving. Some of the gears are splined to the shaft they are on, and they are called "pinion gears". They make the transmission shafts turn. Gear shifting is accomplished by sliding three of the freewheeling gears *sideways* on their shaft. The shifter dogs on the side of the freewheeling 2nd gear are probably worn down from hard shifting under load. There are very few motorcycles where you can get at 2nd gear to undercut the dogs with a dremel tool. There is another possibility though. You might just have an adjustment problem with the monkey motion mechanism that rotates the shifter drum to slide the gears sideways on the shaft. www.bikebandit.com Gearshift-Drum diagram #19: PIN ,A AC 176666-001 is probably an eccentric pin that allows you to adjust the mickey mouse mechanism a little bit. Those are probably the only accessible parts in the gear shifting mechanism. Everything else probably requires splitting the cases for access.
From: Ian Singer on 13 Aug 2008 00:35 RhiannonX(a)gmail.com wrote: > There is another possibility though. You might just have an adjustment > problem with the > monkey motion mechanism that rotates the shifter drum to slide the > gears sideways on the shaft. > > www.bikebandit.com > > Gearshift-Drum diagram > > #19: PIN ,A AC 176666-001 is probably an eccentric pin that allows you > to adjust the mickey mouse mechanism a little bit. > > Those are probably the only accessible parts in the gear shifting > mechanism. Everything else probably requires splitting the cases for > access. At http://www.bikebandit.com/houseofmotorcycles/honda-motorcycle-vf700s-sabre-1984/o/m2755 Which is for 700cc not 750 so could be different I see the pin. Is it suggesting its accessible on the left side of the crankcase and if it only slips in 2nd would adjusting it mess up the other 5 gears? Ian Singer -- ========================================================================= See my homepage at http://www.iansinger.com hosted on http://www.1and1.com/?k_id=10623894 All genealogy is stored in TMG from http://www.whollygenes.com Charts and searching using TNG from http://www.tngsitebuilding.com I am near Toronto Canada, can I tell where you are from your reply? =========================================================================
From: ~ on 13 Aug 2008 01:02
On Aug 12, 9:35�pm, Ian Singer <iansin...(a)sympatico.ca> wrote: > Athttp://www.bikebandit.com/houseofmotorcycles/honda-motorcycle-vf700s-.... > Which is for 700cc not 750 so could be different The only reason that US models were 700cc was that Honda and the other Japanese manufacturers were trying to avoid paying the Harley tarriff. You can check the part numbers for the 750cc models and they will probably be the same. I see the pin. �Is it > suggesting its accessible on the left side of the crankcase and if it > only slips in 2nd would adjusting it mess up the other 5 gears? Maybe. The thing about shifting gears is that it usually takes more shifter pedal motion to shift from first to second than it takes to shift from 2 to 3 to 4, etc. And the typical rider doesn't realize this, so he doesn't kick the lever up enough and the dogs on 2nd gear don't engage fully, they grind a bit and they wear down. |