Front tire cupping
Moderator: Modsquad
- easyrider
- Frequent Poster
- Posts: 1597
- Joined: Sat Dec 19, 2015 6:23 pm
- Year: 2013
- Color: blk
- Location: Long Island , NY, Tampa, Ft laud
Front tire cupping
Noticing a slight bit of cupping on my front tire left side of center.Is this due to more left turns or balancing or other ?Appreciate comments.
- Mel46
- Forum Benefactor
- Posts: 6959
- Joined: Tue Nov 13, 2012 5:13 pm
- Year: 2013
- Color: red PCX
- Location: Dallas, Ga USA
Re: Front tire cupping
That is usually because of improper tire pressure. Honda has a "recommended tire pressure" plate(sticker) on the bike on the left side under the glove box.
Currently own:
Red 2013 Honda PCX150
Givi tall windshield & tailbox - Lots of extra lights
Custom seat from Thailand - Bad Boy Airhorn
Takegawa Lowering Shocks - Michelin City Grip Tires
Headlight assy upgraded to LEDs w/HS5 main bulbs
NCY variator, drive face, and rollers
Red 2013 Honda PCX150
Givi tall windshield & tailbox - Lots of extra lights
Custom seat from Thailand - Bad Boy Airhorn
Takegawa Lowering Shocks - Michelin City Grip Tires
Headlight assy upgraded to LEDs w/HS5 main bulbs
NCY variator, drive face, and rollers
Re: Front tire cupping
Could be camber of the road.
Try driving on the left side of the road for a few thousand miles and see if the right side of the tyre matches the left.
Try driving on the left side of the road for a few thousand miles and see if the right side of the tyre matches the left.
Four decades on two wheels has taught me nothing, all advice given is guaranteed to be wrong
- easyrider
- Frequent Poster
- Posts: 1597
- Joined: Sat Dec 19, 2015 6:23 pm
- Year: 2013
- Color: blk
- Location: Long Island , NY, Tampa, Ft laud
Re: Front tire cupping
Pressure checks are good. Thats an interesting thought on the road camber.
- Mel46
- Forum Benefactor
- Posts: 6959
- Joined: Tue Nov 13, 2012 5:13 pm
- Year: 2013
- Color: red PCX
- Location: Dallas, Ga USA
Re: Front tire cupping
This is what Google says about cupping on motorcycles and scooters:
When braking is applied to the front tire, the load transfer over-flexes the tire and increases the tendency for cupping and uneven wear. ... Under inflation and overloading of motorcycle tires are significant causes of cupping and uneven wear, particularly in association with hard braking ...
That says a lot.
When braking is applied to the front tire, the load transfer over-flexes the tire and increases the tendency for cupping and uneven wear. ... Under inflation and overloading of motorcycle tires are significant causes of cupping and uneven wear, particularly in association with hard braking ...
That says a lot.
Currently own:
Red 2013 Honda PCX150
Givi tall windshield & tailbox - Lots of extra lights
Custom seat from Thailand - Bad Boy Airhorn
Takegawa Lowering Shocks - Michelin City Grip Tires
Headlight assy upgraded to LEDs w/HS5 main bulbs
NCY variator, drive face, and rollers
Red 2013 Honda PCX150
Givi tall windshield & tailbox - Lots of extra lights
Custom seat from Thailand - Bad Boy Airhorn
Takegawa Lowering Shocks - Michelin City Grip Tires
Headlight assy upgraded to LEDs w/HS5 main bulbs
NCY variator, drive face, and rollers
- NADman
- Regular User
- Posts: 186
- Joined: Tue May 01, 2018 9:36 am
- Year: 2013
- Color: black
- Location: Winnipeg Manitoba Canada
Re: Front tire cupping
If it's non directional-try turning it around.
He has all the virtues I dislike and none of the vices I admire. -Winston S. Churchill.
- easyrider
- Frequent Poster
- Posts: 1597
- Joined: Sat Dec 19, 2015 6:23 pm
- Year: 2013
- Color: blk
- Location: Long Island , NY, Tampa, Ft laud
Re: Front tire cupping
I believe it is rotational.The cupping is only on one side.If braking was the cause wouldnt the whole tire tread be cupping?I cant recall any real aggressive braking .Could it be defective tire??
-
- Frequent Poster
- Posts: 1822
- Joined: Sat Jun 20, 2015 12:06 pm
- Year: 2014
- Color: Silver
- Location: Hope, BC, Canada
Re: Front tire cupping
Really cheap suspension on the Forza. There is only one small clamp at the top of each fork. My clamps were not very tight.
I think the front suspension is adequate for 30 mph but not for 80 mph top speed of the Forza.
I bet most front wheels are also out of balance. I put Ride-On tire sealer/balancer in mine but I don't think it does much for the balance. Maybe a little.
My front CityGrip looks awful. Not a smooth wear pattern at all.
I also have a tire pressure monitor on my valve stems that reports via bluetooth to my iPhone. The temperature and pressure varies quite a bit during the day. The rear tire gets very hot since it is right next to the muffler.
I wonder if the right side of the Forza is the same weight as the left side. Muffler (heavy) on right side. Clutch and variator on the left is probably lighter. Both brake disks are also on the right with the muffler.
I think the front suspension is adequate for 30 mph but not for 80 mph top speed of the Forza.
I bet most front wheels are also out of balance. I put Ride-On tire sealer/balancer in mine but I don't think it does much for the balance. Maybe a little.
My front CityGrip looks awful. Not a smooth wear pattern at all.
I also have a tire pressure monitor on my valve stems that reports via bluetooth to my iPhone. The temperature and pressure varies quite a bit during the day. The rear tire gets very hot since it is right next to the muffler.
I wonder if the right side of the Forza is the same weight as the left side. Muffler (heavy) on right side. Clutch and variator on the left is probably lighter. Both brake disks are also on the right with the muffler.
- Attachments
-
- IMG_0307.jpg (119.09 KiB) Viewed 975 times
-
- Forum Benefactor
- Posts: 787
- Joined: Thu Jun 22, 2017 10:28 pm
- Year: 2018
- Color: white
- Location: SE PA
Re: Front tire cupping
Dang !!! There's no bottom triple tree on that front end ???
-
- Frequent Poster
- Posts: 1822
- Joined: Sat Jun 20, 2015 12:06 pm
- Year: 2014
- Color: Silver
- Location: Hope, BC, Canada
Re: Front tire cupping
None, you are right.springer1 wrote:Dang !!! There's no bottom triple tree on that front end ???
But it goes 80 mph!!!
-
- Forum Benefactor
- Posts: 787
- Joined: Thu Jun 22, 2017 10:28 pm
- Year: 2018
- Color: white
- Location: SE PA
Re: Front tire cupping
Well who am I to argue with Honda but ..... I guess it’s just another example how old I (and my assumptions about chassis design) are. Considering our litigation- prone society, I doubt they’d sell an unsafe design.davenowherejones wrote:None, you are right.springer1 wrote:Dang !!! There's no bottom triple tree on that front end ???
But it goes 80 mph!!!
- easyrider
- Frequent Poster
- Posts: 1597
- Joined: Sat Dec 19, 2015 6:23 pm
- Year: 2013
- Color: blk
- Location: Long Island , NY, Tampa, Ft laud
Re: Front tire cupping
I guess Ill ride out this tire until it gets too choppy to live with , then I ll replace it with another brand name and see if the condition is repeated.If so I will do a further look at the forks,balancing,.Could be just the design and weight distribution up front.
Re: Front tire cupping
Wrong way round, there isn't a top one.springer1 wrote:Dang !!! There's no bottom triple tree on that front end ???
The Silverwing FJS600 doesn't have one either.
Weighs around 40 kg more than a Forza and can easily maintain 90mph two-up with luggage.
Four decades on two wheels has taught me nothing, all advice given is guaranteed to be wrong
-
- Frequent Poster
- Posts: 1822
- Joined: Sat Jun 20, 2015 12:06 pm
- Year: 2014
- Color: Silver
- Location: Hope, BC, Canada
Re: Front tire cupping
My front Michelin CityGrip has a fair bit of cupping. I have been running at the recommended tire pressure.
I am going to replace my worn out CityGrips with Mud and Snow Heidenau K66 scooter tires just for a silly expensive experiment.
I am also going to increase the tire pressure in the front to 29 psi which will also be the rear pressure.
ps Does the Forza show 1xx,xxx after 99,999 km or does it go back to zero?
I am going to replace my worn out CityGrips with Mud and Snow Heidenau K66 scooter tires just for a silly expensive experiment.
I am also going to increase the tire pressure in the front to 29 psi which will also be the rear pressure.
ps Does the Forza show 1xx,xxx after 99,999 km or does it go back to zero?