The Honda PCX / Honda Forza / SH Forums

Your predominant source of information for the Honda PCX 125, Honda PCX ESP, Honda PCX 150, and Forza. Now featuring a SH300i / SH150i subforum!
It is currently Thu Dec 14, 2017 7:55 am

All times are UTC - 5 hours




Post new topic Reply to topic  [ 13 posts ] 
Author Message
 Post subject: Fork oil checking
PostPosted: Fri Jul 31, 2015 11:37 am 
Offline
Frequent Poster
Frequent Poster

Joined: Sat Jun 20, 2015 12:06 pm
Posts: 839
Location: Hope, BC, Canada
Year: 2014
Color: Silver
Is there any way of checking how much fork oil I have in my 2014 Forza 300?

I bought a crashed Forza from a scary backyard rebuilder. The front wheel hits really hard on potholes. I know this is not my dual sport DR650 but it should not hit scary hard on little bumps. It is fine on smooth roads.


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Fri Jul 31, 2015 12:18 pm 
Offline
Forum Benefactor
Forum Benefactor

Joined: Sat Jul 04, 2015 4:59 pm
Posts: 255
Location: Michigan
Year: 2013
Color: red
Likely be easier and wiser to look up what's supposed to have and how much. Then just change it and know where you're at.


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Fri Jul 31, 2015 1:13 pm 
Offline
Frequent Poster
Frequent Poster

Joined: Sat Jun 20, 2015 12:06 pm
Posts: 839
Location: Hope, BC, Canada
Year: 2014
Color: Silver
j.d.b. wrote:
Likely be easier and wiser to look up what's supposed to have and how much. Then just change it and know where you're at.

I agree but what is the procedure for changing the fork oil on a Forza? Also for my two hundred pound mass, what weight oil should I use?


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Fri Jul 31, 2015 4:07 pm 
Offline
Forum Benefactor
Forum Benefactor

Joined: Sat Jul 04, 2015 4:59 pm
Posts: 255
Location: Michigan
Year: 2013
Color: red
Okay, a cursory search yields they use 10W up to 20W fork oil. Heavier oil damps harder, lighter will damp less. If the oil weight is the cause of your hard-hitting, go with the 10W and see how it works for you. Here's a thread discussing the Forza fork: viewtopic.php?f=2&t=1285
Scroll down to the quoted manual specs from Maddiedog. He gives an amount and type. Further down, there's a depth spec, as well.
As to how to change it? Maybe some else will chime in, but, generally, forks will have some sort of plug threaded into the bottom and the same or very similar at the top of the stanchions. I use a big syringe (20 or 30 cc) to fill them. I have a PCX manual, but I doubt it applies to your bike.
Anyone else?


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Fri Jul 31, 2015 7:18 pm 
Offline
Frequent Poster
Frequent Poster

Joined: Sat Jun 20, 2015 12:06 pm
Posts: 839
Location: Hope, BC, Canada
Year: 2014
Color: Silver
The bottom of the fork has a hex hole. Is that an adjuster or a drain?

The top of the fork seems smooth by touch. No big hex cap as far as I can feel. How do you get the oil in?

118 ml of oil is not much. Would 20 wt take my weight better or just make the fork slower to react?

Do I have to take the fork off the scooter to change oil?


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Sat Aug 01, 2015 2:37 am 
Offline
New Member
New Member

Joined: Thu Oct 02, 2014 10:53 am
Posts: 36
I would suggest that you buy a service manual for your Forza - available on the internet from the USA. The hex hole screw at the bottom of the fork leg should not be removed unless you are going to totally dismantle the internals of each fork leg as it can be very difficult to put the hex screws back in tight. You have to remove the front wheel and mudguard, disconnect the brake lines from the fork leg bottom. Then remove the top bolt at the top of the fork leg, then slacken off the bolt directly below it. Remove the fork leg and put it into a vice. At the top of the fork leg is a plastic cap which you remove. Then, with an extra pair of hands if you are not used to the process, you have to physically push down the centre of the fork leg (which is basically a large round spacer) where you will see a circlip ring which must be removed. After removal, the fork spring can be removed and the old fork oil emptied onto a container. Refill with 204cc (+ or - 2.5cc) of 10w fork oil in each fork leg. You can check the correct oil level by removing the spring and pushing the tube into the bottom of the fork leg . Measure the oil level from the top of the tube to the oil level and it should be 78mm (3.1 inches).
To rebuild, reverse the process.
The 118 ml figure that you saw was for a PC150 not a Forza 300.


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Sat Aug 01, 2015 11:49 am 
Offline
Frequent Poster
Frequent Poster

Joined: Sat Jun 20, 2015 12:06 pm
Posts: 839
Location: Hope, BC, Canada
Year: 2014
Color: Silver
glencoeman wrote:
I would suggest that you buy a service manual for your Forza - available on the internet from the USA. The hex hole screw at the bottom of the fork leg should not be removed unless you are going to totally dismantle the internals of each fork leg as it can be very difficult to put the hex screws back in tight. You have to remove the front wheel and mudguard, disconnect the brake lines from the fork leg bottom. Then remove the top bolt at the top of the fork leg, then slacken off the bolt directly below it. Remove the fork leg and put it into a vice. At the top of the fork leg is a plastic cap which you remove. Then, with an extra pair of hands if you are not used to the process, you have to physically push down the centre of the fork leg (which is basically a large round spacer) where you will see a circlip ring which must be removed. After removal, the fork spring can be removed and the old fork oil emptied onto a container. Refill with 204cc (+ or - 2.5cc) of 10w fork oil in each fork leg. You can check the correct oil level by removing the spring and pushing the tube into the bottom of the fork leg . Measure the oil level from the top of the tube to the oil level and it should be 78mm (3.1 inches).
To rebuild, reverse the process.
The 118 ml figure that you saw was for a PC150 not a Forza 300.


Thanks for the info, some forks have a drain and some don't.


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Sat Aug 08, 2015 11:17 pm 
Offline
Frequent Poster
Frequent Poster

Joined: Sat Jun 20, 2015 12:06 pm
Posts: 839
Location: Hope, BC, Canada
Year: 2014
Color: Silver
I am dyslexic and have had too many head injuries so I don't trust myself sometimes to work on motorcycles even though I have an ancient piece of paper somewhere which says I know one end of a wrench from the other.

I took the Forza to my dealer. They replaced the fork seals and added heavier oil.

It seems better but it did not suddenly make this into a dual sport on the bumps.


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Sun Aug 09, 2015 3:51 am 
Offline
Forum Benefactor
Forum Benefactor
User avatar

Joined: Tue Dec 06, 2011 7:54 pm
Posts: 6072
Location: NE Scotland
Year: SV650AL7
Color: The correct one
davenowherejones wrote:
it did not suddenly make this into a dual sport on the bumps.


With 3.7 inches of front suspension travel it never will be.
You need to learn to ride around the bumps.

_________________
Four decades on two wheels has taught me nothing, all advice given is guaranteed to be wrong


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Sun Aug 09, 2015 10:00 pm 
Offline
Frequent Poster
Frequent Poster

Joined: Sat Jun 20, 2015 12:06 pm
Posts: 839
Location: Hope, BC, Canada
Year: 2014
Color: Silver
gn2 wrote:
davenowherejones wrote:
it did not suddenly make this into a dual sport on the bumps.


With 3.7 inches of front suspension travel it never will be.
You need to learn to ride around the bumps.


Aw but my DR650 just goes over them.

Some of the bumps sneak up on me sometimes.

Is it really only 3.7 inches?

It is a good job I have a few extra inches of padding in my ass! I knew it would become useful somewhere.


500 km ride and it did not rain at all. Yay, Yay!!!


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Mon Aug 10, 2015 2:49 am 
Offline
Forum Benefactor
Forum Benefactor
User avatar

Joined: Tue Dec 06, 2011 7:54 pm
Posts: 6072
Location: NE Scotland
Year: SV650AL7
Color: The correct one
davenowherejones wrote:
Is it really only 3.7 inches?


Yes and no.
Total travel is 3.7 inches.
Subtract from that whatever it sags by when you sit on it.

_________________
Four decades on two wheels has taught me nothing, all advice given is guaranteed to be wrong


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Fri Nov 17, 2017 3:18 pm 
Offline
Frequent Poster
Frequent Poster

Joined: Sat Jun 20, 2015 12:06 pm
Posts: 839
Location: Hope, BC, Canada
Year: 2014
Color: Silver
Old thread update.

At 10,000 km I took it to my dealer and had heavier oil put in. Not sure if there was any to start with. It fixed the problem.

I blew the seals at 52,000 km but that was after 42,000 of hard riding and a little mild off-roading.


Top
 Profile  
 
 Post subject: Re: Fork oil checking
PostPosted: Fri Nov 17, 2017 9:22 pm 
Offline
Regular User
Regular User

Joined: Sat Nov 05, 2016 2:03 pm
Posts: 217
Location: northern ontario
Year: Forza 300
Color: red/2014
@ 13Kkm, both mine's forks showed the factory oil capacity, plus it was surprisingly clean looking.
I used 10w BelRay as a replacement... couldn't see any difference. It still HATES potholes...
that's what small wheels/2.5 inch travel are all about.

The triple clamp bolts were torqued to the death, so were the axle nut and the lower fork axle-clamp
bolt. I put anti-seize everywhere and tightened them 'just enough'.

Hopefully it will make it to 40K before it needs new seals...


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 13 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Like what you see here? Buy the admin a beer! Donate at the link below:

Powered by phpBB® Forum Software © phpBB Group. Color scheme by ColorizeIt!