YS91SR Needle settings

[MrMel]

I got a new SR today, but the manual was in Japanese.

Anyone here has the run-in + final suggested needle settings or know if its the same as the ST?

[Jeff Palmer]

http://www.freestyle3d.com/ys_tuning_tips.html

[MrMel]

Seems a bit unclear, Those are the final running needle settings on that page? anyone know the run-in values suggested?

[pdman]

This is from the manual:

Hover- 1.75
Low end - 1.25
High end - 1.25

[newbie]

Hi all :)
What's the difference between the YS 91 ST an SR(red head)
Wich muffler to use with?
it's for a JR AS 90.
thanks :)

[MrMel]

First note, that RED head does NOT automatically means SR, there is an old "ST" version called STR which also have a red top, dont mix that up with the new SR (even some vendors do...)

Now, SR is the Long stroke version, has longer stroke length, meaning more torque.
There is a special pipe for it, Hatori SB-19FH

[newbie]

Ok thanks MrMel :)
where did you found your Hatori SB-19FH muffler?
Dind't found it on the hatori's web page?!( #937 for YS 91 ST)
also didn't found it from Ishimokeï japan :( i'm a little bit dissapointed :(
thanks
newbie

[MrMel]

http://www.ronlund.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=heli&Product_Code=HATMSB19FH

Only in the US I think.

[newbie]

:) thanks

[idhoverman]

In the english language manual of the 91SR, the needle setting is exactly like the 91ST (for running in and afterwards).

[jimheliboy]

Check on Heliproz.com. I think they have them as well!

[deltaoverride]

Tammieshobbies.com has them as well just order from there website or visit there store in Beaverton, OR they are great people they have helped me a lot!