Rake and Trail Comparison

For general chat about the Kawasaki H2SX (SE). One Wheel Drive forum for all other bike talk.
Post Reply
User avatar
PaulieG
Boost Engaged
Boost Engaged
Posts: 46
Joined: Nov 6th, 2018
Location: Northern VA
Bike(s): ZX-14
x 9
x 23

Rake and Trail Comparison

Post by PaulieG » Fri Feb 08, 2019 4:37 pm


I currently ride a 2009 ZX-14, I've got a '19 H2SXSE+ on order (Feb delivery - so they tell me).

The rake and trail of my 14 is 23 degrees rake and 3.7 inches of trail.

The H2 numbers are 24.7 degrees of rake and 4.1 inches of trail.

It is worth noting that both bikes have an identical wheelbase of 58.3 inches and the 14 has a seat height of 31.5 inches while the 32.9 (so on the H2 I'll be sitting nearly an inch and a half higher).

Does this indicate to you all that I will see noticeably more sluggish turn in and less "twitchy-ness" in the H2, or are those numbers so close as to not make a noticeable difference? I have no idea if 1.7 degrees of rake is a big change.

I currently love the way the 14 handles given the weight of the beast.
0 x

User avatar
57x
Accelerating
Accelerating
Posts: 204
Joined: Apr 19th, 2018
Location: California, USA
Bike(s): 2018 H2 SX SE
x 2
x 69

Re: Rake and Trail Comparison

Post by 57x » Sat Feb 09, 2019 1:27 am


They lie on the H2 SX seat height. It is about the same as the 14. I have a 30" inseam and can bend my knees at a light. Frankly, it is too low for me.

I had an 06 ZX14. The H2 SX feels more top heavy to me at slow speeds but turns better at speed.

Let's see what others think.
0 x

User avatar
JOHN-DYNOSTAR
14.7 psi
14.7 psi
Posts: 13
Joined: Sep 29th, 2018
Bike(s): zzr1400 FZS1000
Website: http://www.jwmotorcycles.co.uk/
x 2
x 3

Re: Rake and Trail Comparison

Post by JOHN-DYNOSTAR » Sat Feb 09, 2019 1:12 pm


just to give you some Idea
1 degree roughly is the equivalent of 12mm in length on a wheelbase.
GSXR's run approx 23.5 degrees ( sharp steering)
custom bikes run 27 degrees roughly ( lazy steering )

when we had bikes running in the BSB race series some of the riders could detect the difference of 0.5 of a degree rake . but not many.
for the road 0.5 degree is not an issue.
1.7 degrees however is considerable . ie; 20mm longer.
but the swingarm /chassis could be longer/shorter
a different sprocket can adjust the length of the bike ( wheel in slots on swingarm) . this in certain circles means the
leverage on the swingarm is different and the suspension needs adjusting .

:)
Tips-Rake-and-Trail1.jpg


it is worth noting that if you raise the rear ride height by 6mm you will adjust the head angle by 0.5 of a degree.
and if you drop the forks through the yokes by 6mm then another 0.5 of a degree is gained.
seat height the same :doh: possibly, but 1 degree different and sharper steering.

using this principal in reverse
this is why all lowered Busas steer like barges :D

hope this helps
0 x

User avatar
57x
Accelerating
Accelerating
Posts: 204
Joined: Apr 19th, 2018
Location: California, USA
Bike(s): 2018 H2 SX SE
x 2
x 69

Re: Rake and Trail Comparison

Post by 57x » Mon Feb 11, 2019 10:36 pm


I would also think fork height would change handling. If you raise the front of the bike it slows turn-in (with the same given rear height). Without all the dimensions it is hard to compare how the two would react.
0 x

User avatar
PaulieG
Boost Engaged
Boost Engaged
Posts: 46
Joined: Nov 6th, 2018
Location: Northern VA
Bike(s): ZX-14
x 9
x 23

Re: Rake and Trail Comparison

Post by PaulieG » Tue Feb 12, 2019 5:52 pm


Hey John, thanks a bunch for the run down, very interesting numbers. It will be interesting to line both bikes up in the garage and see what a side by side comparison looks like. I'll post some pics if it's interesting and worthwhile.
0 x

User avatar
JOHN-DYNOSTAR
14.7 psi
14.7 psi
Posts: 13
Joined: Sep 29th, 2018
Bike(s): zzr1400 FZS1000
Website: http://www.jwmotorcycles.co.uk/
x 2
x 3

Re: Rake and Trail Comparison

Post by JOHN-DYNOSTAR » Wed Feb 13, 2019 9:55 am


another interesting/non interesting point. seat height;
distance from seat to floor
I bought the most beautiful seat I have ever seen and fitted it. suddenly the footrests were too near my arse and I had cramp.
so distance seat to footrest is important.
because if you fit a comfortable seat you may not be able to reach the floor in my case :rant: :D

just a point to consider whilst you are measuring :cheer: :D
0 x

User avatar
THOR
Low Boost
Low Boost
Posts: 184
Joined: Jul 23rd, 2018
Location: London
Bike(s): Kawasaki H2 SX SE
x 42
x 33

Re: Rake and Trail Comparison

Post by THOR » Tue Mar 12, 2019 11:18 pm


I think SX SE could do some preload or lifting on the back so it can turn more easy.
0 x

Post Reply
meble kuchenne na wymiar warszawa cennik

Who is online

Users browsing this forum: No registered users and 14 guests