7/11 sprocket ratio

[Merijn]

Hello all,  my first post here.

I have a '89 powerscreen engine stored and decided to do something with it, so I bought a '89 slingshot 750 frame to build a 7/11 from there on.

But now I can't really find any information on the sprocket ratio. Is it common to use the standard sprocket size of the engine, or is there a recommended one?

Hope someone can help me with this, thank you in advance!

[dupersunc]

Use the stock 15/48 that the gsxr1100 uses. 14/48 if you want to save front tyre wear.

[Blubber]

Hi, 

Welcome to OSS, 

 

Introduction in general please 

 

PS.  We like pictures and have rules 

[Askamaskinservice]

Welcome to OSS, we like pictures .........A  LOT..........

[Merijn]

2 hours ago, dupersunc said:

Use the stock 15/48 that the gsxr1100 uses. 14/48 if you want to save front tyre wear.

Thanks! 

 

2 hours ago, Blubber said:

Hi, 

Welcome to OSS, 

 

Introduction in general please 

 

PS.  We like pictures and have rules 

Will do!

Still collecting parts and gathering info, will post pictures when I start building 

[Swiss Toni]

Hi, and welcome! Plenty on here use the old Powerscreen engine as a good base! Tourqey!

[carlinmidarlin]

Try 14/47 for a laugh

[Ivan]

My 6/11 has 14/48

[carlinmidarlin]

What’s it go like now

[bluecatone]

I'm fitting a 88 GSX1100F on a 82 GSX750E with 86 GSXR750 front and rear end, the GSXF sprockets are 15/52 should I go a little bigger on the back since the GSXR wheel is bigger in diameter? Thanks.

[Gixer1460]

I was surprised to see that an 1100F used 52T rear as the GSXR1100 uses a 48T std. and mine used to pull a 45T quite easily. So no you don't want to go bigger unless you want zero front tyre wear! I thought they were both 17" rims?

[dupersunc]

Gsxf had a helically cut primary, so I guess the ratio was different also. 15/52 would make a gsxr1100 pretty lively.

[Merijn]

5 hours ago, Gixer1460 said:

I was surprised to see that an 1100F used 52T rear as the GSXR1100 uses a 48T std. and mine used to pull a 45T quite easily. So no you don't want to go bigger unless you want zero front tyre wear! I thought they were both 17" rims?

Gsxf has a 16" rim.  The F is a lot heavier than a 7/11 tho, wouldn't that be a factor as well?

[Gixer1460]

35 minutes ago, Merijn said:

Gsxf has a 16" rim.  The F is a lot heavier than a 7/11 tho, wouldn't that be a factor as well?

Odd as a 15/52 is lower geared than a 15/48 and with a lower rolling circumference goes less distance per rev  - maybe it runs a taller profile to equal a 60 profile on GSXR ? Yes weight would be an issue on accel. but as a general / touring use, top speed wouldn't be so crucial?

[Merijn]

44 minutes ago, Gixer1460 said:

Odd as a 15/52 is lower geared than a 15/48 and with a lower rolling circumference goes less distance per rev  - maybe it runs a taller profile to equal a 60 profile on GSXR ? Yes weight would be an issue on accel. but as a general / touring use, top speed wouldn't be so crucial?

The GSXF has an 150/80, so yeah that'll be about the same as the GSXR then.

Edited October 14, 2019 by Merijn

[Ivan]

On 9/28/2019 at 9:02 AM, carlinmidarlin said:

What’s it go like now

14/48 is fine by me for my gsx6-11f,  became fast bike