Forza Mf10 - Rattling noice

bonjo · Post by **bonjo** » Mon Oct 12, 2020 12:22 pm

Hi all,

Not sure whats the cause for this noice, happens when accelerating only, also the motor seems to have less power at pickup.
Noice (Video) - https://vimeo.com/467431344

Has anyone had the same issue? any solutions?

Appreciate your help on this matter thanks.

bonjo · Post by **bonjo** » Mon Oct 12, 2020 12:57 pm

Deleted - Duplicate Post (sometimes this happens)

davenowherejones · Post by **davenowherejones** » Mon Oct 12, 2020 3:29 pm

That looks different than my 2014 Forza 300.

What size & year is yours?

bonjo · Post by **bonjo** » Mon Oct 12, 2020 3:41 pm

davenowherejones wrote:That looks different than my 2014 Forza 300.

What size & year is yours?

Forza 250 - Mf10

davenowherejones · Post by **davenowherejones** » Mon Oct 12, 2020 4:17 pm

How old is it and where do you live?

gn2 · Post by **gn2** » Mon Oct 12, 2020 6:13 pm

Sounds like a leaky exhaust header gasket.
Or belt slap.
How many miles on the belt?
Any aftermarket parts fitted?
How does it sound with the cover on?

bonjo · Post by **bonjo** » Tue Oct 13, 2020 1:44 am

davenowherejones wrote:How old is it and where do you live?

2008 Mf10

bonjo · Post by **bonjo** » Tue Oct 13, 2020 1:55 am

gn2 wrote:Sounds like a leaky exhaust header gasket.
Or belt slap.
How many miles on the belt?
Any aftermarket parts fitted?
How does it sound with the cover on?

The bike had been left aside for 8months.
Didint look like belt slaps as the sound happens only in high RPMS

How many miles on the belt?
Not sure about 2000-5000Km

Any aftermarket parts fitted?
Exhaust is after market.

How does it sound with the cover on?
Same and can be heard by 100feet apart while passing by.

Few other tips i got was.
Clogged fuel pump.
Clutch spring issue.

gn2 · Post by **gn2** » Tue Oct 13, 2020 4:25 am

Check the exhaust connections.

bonjo · Post by **bonjo** » Fri Oct 16, 2020 9:57 am

gn2 wrote:Check the exhaust connections.

Seems to be like the inner part of the exhaust is broken even the DB killer was laying inside the exhaust so their has be some chipped parts inside. Thanks for the info btw

bonjo · Post by **bonjo** » Mon Jan 11, 2021 5:34 am

Just fitted the stock exhaust and still got the same noice.

easyrider · Post by **easyrider** » Mon Jan 11, 2021 4:19 pm

Seems like there excessive belt play on acceleration, but not the cause of the rattle noise. Check rollers use steth to see if noise coming from clutch housing or variator.. A new belt wouldn't hurt as a starter.

springer1 · Post by **springer1** » Mon Jan 11, 2021 7:27 pm

bonjo wrote:Just fitted the stock exhaust and still got the same noice.

Header gasket fitted OK ? It sure sounds like a header/pipe leak.

The Honda PCX / Forza / ADV150 / SH Forums

Forza Mf10 - Rattling noice

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