GL1000 race bike build

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Shcrt
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GL1000 race bike build

#1

Post by Shcrt »

Hello,
I live in Sweden and I found this wonderful website for a while. love this page and all the lovely builds that have been posted.

I was going to share my own build.
I drive classic road racing and have been doing it for some years.

A couple of years ago I got the idea to build a race bike from a Gl1000. I have almost completed the construction now but some parts remain.

chassis:
reinforced original frame
reinforced swing
41mm front fork
brembo brakes
isr brake discs
cone shock absorber
3,5” x18 rim in front
4,25” x18 rim in rear
Raised 40mm in the rear

engine:
ported and leveled cylinder heads
ignitech ignition
dynatek ignition coils
high-pressure pistons
new bearings throughout the engine
4-2-1 exhaust system
weber idf 40 carburetor
lightened crankshaft
stator wheel removed
starter device removed
75 camshafts
Last edited by Shcrt on Sun Nov 07, 2021 12:59 pm, edited 1 time in total.
Shcrt
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Re: GL1000 race bike build

#2

Post by Shcrt »

Some pictures
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Shcrt
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Re: GL1000 race bike build

#3

Post by Shcrt »

Painted
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Shcrt
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Re: GL1000 race bike build

#4

Post by Shcrt »

Painted
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dontwantapickle
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Re: GL1000 race bike build

#5

Post by dontwantapickle »

Interesting build.
I'd like to know how it handles with a 18" front tire. It looks pretty cool.
what are "high-pressure pistons?
When are you planning on racing it? let us know how it does. The proof is in the pudding.
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Re: GL1000 race bike build

#6

Post by Shcrt »

Hi thanks

I had it on the track a few months ago and I can say that it's like maneuvering a bus :)

The pistons are high compression pistons. google translate thought it sounded better :)
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desertrefugee
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Re: GL1000 race bike build

#7

Post by desertrefugee »

I also think this is a very interesting build. Nice work. I really like that fairing. If you don’t mind, I also have a couple of questions.

1) Do you know what the final compression ratio will work out to with those pistons? I’d be worried a bit about OEM head gaskets with higher compression.

2) How heavy will the finished Motorcycle be?

3) In what class will you running…in other words what will be your competition?
- Life is not about waiting for the storms to pass. It's about learning to ride in the rain.
Shcrt
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Re: GL1000 race bike build

#8

Post by Shcrt »

hi, nice to hear you like it.

the compression is about 10.5: 1, I also had thoughts that there may be problems with the cylinder head gasket.
I have driven it for about two hours and so far no major problems.
Have seen that some drive turbo on these engines, maybe they use copper gasket and if I have problems it will be to use copper gasket for me too.

I have reduced the dry weight to about 200kg.

It will compete in class 7A, it is motorcycles from 250-1300cc year model 77-87. So there will be tough resistance. Honestly, it's more of a fun bike than a winning bike :)
Last edited by Shcrt on Sun Nov 07, 2021 6:03 pm, edited 1 time in total.
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Re: GL1000 race bike build

#9

Post by Shcrt »

A video from the first test at the track



https://youtube.com/shorts/OpSEqQA2Z4c?feature=share
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Re: GL1000 race bike build

#10

Post by Sagebrush »

I fixed the link for you.
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Shcrt
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Re: GL1000 race bike build

#11

Post by Shcrt »

some pictures of engine renovation
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Last edited by Shcrt on Tue Nov 09, 2021 11:05 am, edited 1 time in total.
Shcrt
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Re: GL1000 race bike build

#12

Post by Shcrt »

Heads
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dontwantapickle
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Re: GL1000 race bike build

#13

Post by dontwantapickle »

Good pics!
Keep them coming!
wannabridin
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Re: GL1000 race bike build

#14

Post by wannabridin »

Sounds great!!! I've an ignitec ignition box on my spirit 750 and it's great for the price!

What size is that rear tire??
cfairweather
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Re: GL1000 race bike build

#15

Post by cfairweather »

Excellent work. I can tell you take the time to do everything right.
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