Topic: New Motion Pro Throttle Cables....very stiff throttle opening.

[Shinobi68]

Trying to figure out what's going on with my throttle cables. Carbs are new rebuilt, push/pull new throttle cables. Very tight to twist on, snaps back quickly. It's not that they aren't working they are just really stiff to turn on. There is no binding of any sort, it's smooth and tight. Are there different throttle/carb spring available?

[bryanj]

Two possible faults,
1 put grease inside throttle tube to turn easier
2 routing of cables

[newday777]

Routing with too long or too short of cables, depending upon what bars you have on the bike, can bind the cables making them stiff to turn the throttle grip. Also where the clutch cable and brake hose hits the throttle cables can make a difference.
Is it stiff in just the straight ahead position of the bars or in all positions of the bars as you swing the bars in the multiple positions in the arch of the bars? As in your other post on jetting,  pictures are needed to help determine what you have to help you figure it out.
Did you change the bars and cables or did you have someone else do it? What length cables did you get?

I've been sleuthing through all your posts to try to figure out what you have but not enough information given by you to determine it so far. Where is Cali are you? I have been wintering in Oceanside (usually).

[Scootch]

Trying to figure out what's going on with my throttle cables. Carbs are new rebuilt, push/pull new throttle cables. Very tight to twist on, snaps back quickly. It's not that they aren't working they are just really stiff to turn on. There is no binding of any sort, it's smooth and tight. Are there different throttle/carb spring available?

Some things that helped on my bike....  greased the throttle tube on the handlebar and greased the area of the throttle cable where it rides in the two halves of the throttle clamp at the handlebar. In my case I also found (which doesn't apply to your bike) was that the cable routing to the two outside carbs was not routed correctly. Instead of the outside cables going over top of the frame bars under the tank the cables were routed under the frame bars. This was causing a severe bend in the two outside cables just before they entered the top of the carbs. Looping the cables over the top of the bars reduced the bends considerably. The combination of doing both of these things reduced my throttle effort about in half.
   

[dave500]

graphite powder is best on the bars and throttle tube,wet lubes like oil or grease are good at first but gum up later,also the balance between the push/pull cable must be correct,i like to set up the pull cable first,then do the return push one,it can be a little slack if need be.

[beemerbum]

I threw my MotionPro throttle cables into the trash bin. They were never right no matter what I did. Got some new cables from DSS. They have Honda part numbers on them yet likely not OEM. Problem fixed instantly.

[seanbarney41]

I have had motion pro throttle cables on a cb750 many times over the years and they always worked fine.  As beemerbum says, they are not nearly as nice as oem, but careful routing and adjustment and they will work fine.  Lots of guys complain about heavy throttle return spring on these.  I think Honda was worried about the throttle sticking on a large, powerful bike and possibly over engineered.  So it may be that you just have to adapt or try to change the spring.  Besides what has already been mentioned, I have found a bit Marvel Mystery Oil or other light oil on the throttle pivots and rods can really help.

[HondaMan]

I've usually found the Motion-Pro cables to drag, because they don't have the slick plastic liner on the cable. They are just steel-on-steel, so a good lube of some kind will help. I've used STP, 20w50 oil (from the dipstick on my own bike) and Dri-Slide, but the latter finally jammed up somewhere inside the cable. Look for the plastic-lined type, the liners were originally Teflon but are probably Delrin today. These outlast the non-lined type almost 5-to-1.

[stocky]

my new aftermarket cable was the exact same way, tight and would snap back even after applying cable lube. can't recall if it was motionpro but got it from 4into1 and it ended up snapping on me only after a year of occasional riding. put the old oem one back on and it was like a different bike, night and day difference. glad it snapped...

[beemerbum]

They are made by the communist chinese. Reason enough for them to reside in the garbage

[dave500]

as Hondaman said,the old teflon coated ones are just so much nicer and slick,even clutch cables just work as they should.

[Deltarider]

as Hondaman said,the old teflon coated ones are just so much nicer and slick,even clutch cables just work as they should.

And they live very long. My second clutch cable is now 65.000 kms old. Tailor made in two models: for Euro as well as US style handlebar. No lubing needed.

[Shtonecb500]

mine turn hard in the beginning, they have to be lubed.