Suzuki fa 50 low top speed

Ayoub Ayari /

My suzuki fa 50 ran about 45 kmh (around 27mph) but with a farting sound.

Then i let it sit for 1 year.

Now i changed the tranny oil and and a new air filter and cleaned the carb.

But now it only goes 30 kph (around 20 mph) and also with a farting sound.

I searched online and saw that the reeds on these nopeds go bad after a long term and causing that farting sound. It isnt a carb problem because i adjusted the air/mixture screw like recommended.

Is it the reeds or something else.

Please help me out .

Re: Suzuki fa 50 low top speed

Dirty30 Dillon /

Sounds like you have an idea what could be wrong, but I would start by decarboning you pipe and exhaust port. The FA's run real thick with oil using the injector.

After that, replacing reeds is a good maintenance item anyway, although I doubt they will have worn enough to cause your issue.

Also, changing your plug and fresh gas never hurts.

Re: Suzuki fa 50 low top speed

Ayoub Ayari /

I'm gonna do it right now.

Thx for the reply. Im gonna let you know if i made some progress

Re: Suzuki fa 50 low top speed

Are you absolutely sure you put the correct amount of oil back in the transmission when you changed it?

These are sensitive to oil levels and top speed reflects that.

Also, did it seem like it was low when you dumped the old oil?

Re: Suzuki fa 50 low top speed

Ayoub Ayari /

Yes im sure i put 500ml of 70w90 gear oil in it. The oil didn't seem low but it was really watery because i dint change it for 4 years.

Re: Suzuki fa 50 low top speed

Ahhhhhhh. Theres your problemo.

Wtf did you come up with gear oil???

Half a quart or 500ml is correct though.

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(edited)

Re: Suzuki fa 50 low top speed

Ayoub Ayari /

Im gonna chance the oil with 20w40.

I saw on another forum that you can use gear oil,thats why.

My bad thx for you're help bro.

Re: Suzuki fa 50 low top speed

No problemo

I experienced a similar situation on my express, which is basically a honda version of the Suzuki.

In my case what I figured out was that my case had leaked over time lowering the amount of oil. Upon an oil change I re filled with correct amount only to find I lost 2-3 mph on top end.

Since there will be small amounts of gear oil that remains upon draining, I dont see it hurting to go slightly thinner than what book says. Say, 10w30 or 10w40. I cant say ive ever seen 20w40 before.

IIRC the honda uses 10w30 in the trans. case.(edited)

Re: Suzuki fa 50 low top speed

Read the manuals .

https://drive.google.com/drive/folders/1raDJJQ2M_A8v9lFIxSyYpzRKIRMQ4a1f

If you had , you'd know there's a screw that limits the amount of oil for the transmission .

I have tried a number of different oils in my FA50 over the years and have found that 15w40 diesel oil is best overall . It has no or a lot less friction reducers and as such the clutch functions better .

Re: Suzuki fa 50 low top speed

> P D Wrote:

> -------------------------------------------------------

> Read the manuals .

>

> https://drive.google.com/drive/folders/1raDJJQ2M_A8v9lFIxSyYpzRKIRMQ4a1f

>

> If you had , you'd know there's a screw that limits the amount of oil

> for the transmission .

>

> I have tried a number of different oils in my FA50 over the years and

> have found that 15w40 diesel oil is best overall . It has no or a lot

> less friction reducers and as such the clutch functions better .

Wiki that^^

Re: Suzuki fa 50 low top speed

> live ɘvil Wrote:

> -------------------------------------------------------

> > P D Wrote:

>

> > -------------------------------------------------------

>

> > Read the manuals .

>

> >

>

> >

> https://drive.google.com/drive/folders/1raDJJQ2M_A8v9lFIxSyYpzRKIRMQ4a1f

>

> >

>

> > If you had , you'd know there's a screw that limits the amount of oil

>

> > for the transmission .

>

> >

>

> > I have tried a number of different oils in my FA50 over the years and

>

> > have found that 15w40 diesel oil is best overall . It has no or a lot

>

> > less friction reducers and as such the clutch functions better .

>

> Wiki that^^

Done .

Re: Suzuki fa 50 low top speed

Ayoub Ayari /

I have one little problem .

I cant open the the screw for the oil level. It's really tight i sprayed it with wd40

and still it doesn't wanna open.

Any suggestions how i can open the screw?

Re: Suzuki fa 50 low top speed

Pic please. I never owned one.

Re: Suzuki fa 50 low top speed

If you're going to work on bikes , you might consider owning a hand held impact driver .

Here's one at Home Depot for 17 bucks that might last you a lifetime .

Home Depot

Re: Suzuki fa 50 low top speed

^^^^ best tool I have ever bought, gotten me out of some pickles before..

Re: Suzuki fa 50 low top speed

> P D Wrote:

> -------------------------------------------------------

> If you're going to work on bikes , you might consider owning a hand held

> impact driver .

>

> Here's one at Home Depot for 17 bucks that might last you a lifetime .

>

> https://images.homedepot-static.com/productImages/3b2ff7df-ceee-426c-931a-14e166887214/svn/tekton-multi-bit-screwdrivers-2910-64_1000.jpg

>

> Home Depot

Yes.

I have two of these.

One is a cheapo I bought 25 years ago and will probably last a lifetime. You can't break em. The bits get broke but you can replace those.

The other one is Matco and honestly does not work any better.

Re: Suzuki fa 50 low top speed

Ayoub Ayari /

Changed the oil with 10w30 and still the same problem.

I'm just gonna change the reeds.

Does anyone know the tickness that i need for the reed paper?

Re: Suzuki fa 50 low top speed

> Ayoub Ayari Wrote:

> -------------------------------------------------------

> Changed the oil with 10w30 and still the same problem.

>

> I'm just gonna change the reeds.

>

> Does anyone know the tickness that i need for the reed paper?

On the express I verified it was the oil levelwhen I removed some and it gained back what it had lost on top end.

The expresses loose oil out the trans case vent over time.

Stock reeds are stainless.

Re: Suzuki fa 50 low top speed

Ayoub Ayari /

Im sure that the reeds are the problem because i saw on a forum if your reeds are bad it spits gasoline out of the carb intake.

I looked in the house of the air filter and it had gas in it.

Re: Suzuki fa 50 low top speed

> Ayoub Ayari Wrote:

> -------------------------------------------------------

> Im sure that the reeds are the problem because i saw on a forum if your

> reeds are bad it spits gasoline out of the carb intake.

>

> I looked in the house of the air filter and it had gas in it.

Pull the intake and reed block to inspect before anything else.

Worse case they are good and you buy/make new gaskets. If the old gaskets are thick enough you could re use them.

Re: Suzuki fa 50 low top speed

Try an experiment.

Drain 100ml of the 500 you put in and go ride it. If it works dont get greedy.

Its quite possible that enough gear oil remained to make even 10w30 too thick.

Re: Suzuki fa 50 low top speed

Ayoub Ayari /

Gonna try it tomorrow.

I'm gonna reply back if something is approved.

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