OK, here's what I have. Most of these chords are played using weird inversions. George doesn't help much as he's playing different chord inversions to the soundtrack, but his uke looks like it's ADF#B-tuned.
D7 / Gm
Gm
If there's one thing that I like, it's riding around on a motorbike
Eb7 / D7 / Gm
I'm a speed king when I once begin
Gm / Eb / D
I once won first prize two and six, I know all the dirt track dirty tricks
F / F7
I'm a marvel when I'm out to win
Dm / A7 / D / DM7 / D7
In a fifty mile race I am the best, I ride five miles and skid the rest
D / G6
So come along and see me riding in the T.T. races
D7 / G6
Easier than hop scotch, beating all the top notch aces
E7 / A7
I've been riding all my life, I started quite small
A7 / D7
I've ridden fairy cycles, aye, and scooters and all
D7 / G6
Hear the people cheer me when they see me steering backwards
G7 / C
Down the hill I go at break-neck speed
C / Cm / G / E7
See me coming down the street with the winning post on the pillion seat
D7 / G / Eb7 / D7
So come along and see me riding in the T.T. race
D7 / G6
Come along and see me riding in the T.T. races
D7 / G6
Easier than hop scotch, beating all the top notch aces
E7 / A7
Once my bike was hard to ride, but I didn't mind
A7 / D7
Until I found they'd hitched a charabanc on behind
D7 / G6
Everybody's scaring, I am such a daring rider
G7 / C
My inside rattles when I go the pace
C / Cm / G / E7
My ribs begin to shake about, there's all my spare parts sticking out
D7 / G / Eb7 / D7
So come along and see me riding in the T.T. race
D7 / G6
D7 / G6
E7 / A7
A7 / D7
D7 / G6
G7 / C
C / Cm / G / E7
With my gears in reverse, the other way round I'll finish first
D7 / G
So come along and see me riding in the T.T. race
May have got a couple of those wrong, please let me know what you think...