Topic: Finally rebuilding my CB 750

[Sam Green Racing]

gee, it's been a while.....

....no $hit. I was a young man when I helped Juha out with parts. I am now officially elderly.

hahahaha

[Sam Green Racing]

Unless you're going land speed racing, dump the cam and get a DP295 Juha, you'll thank me.

[PeWe]

Just noticed Hindle exhaust is available again. Anyone have one of these reproduction pipes?

I have one but it is sitting in the box.

My bike has a Hindle 4-2-1 with long muffler and classic tip. I have a short muffler in a box, though   I could not resist to order both while order.

It work really fine.
I have had several carb testing rides the last weeks testing the very first 1-2mm throttle lift with different jets.

Bike runs really silent then in legal speeds! Just a humming sound.
Completely different when twisting! Like Dr Jekyll and Mr Hyde.

It is very easy to come into a hard riding mode on tighter country roads and pass cars one by one or a hole bunch twisting throttle a lot with almost a sonic bang for the snails driving the cars!!

This exhaust can really make the horn to grow out of your forehead!! The corners are thrown right into your face so improved brakes is a good thing!

My carbs and engine (Billet block 1005cc) started to breath really well with this system and all jetting had to be changed.
I'm currently waiting for the last jets to finalize the jetting project.

Kemp at Ripple Rock Racers is a very nice and service minded person. The exhaust weights very little too!
https://www.ripplerockracers.com/product/cb750-hindle-vintage-racing-exhaust-system-fits-1969-78/

[Leino]

Unless you're going land speed racing, dump the cam and get a DP295 Juha, you'll thank me.

I have to drag race the bike at least once. Ripa promised me a bottle of vodka if I do it 

[Leino]

Just noticed Hindle exhaust is available again. Anyone have one of these reproduction pipes?

I have one but it is sitting in the box.

My bike has a Hindle 4-2-1 with long muffler and classic tip. I have a short muffler in a box, though   I could not resist to order both while order.

It work really fine.
I have had several carb testing rides the last weeks testing the very first 1-2mm throttle lift with different jets.

Bike runs really silent then in legal speeds! Just a humming sound.
Completely different when twisting! Like Dr Jekyll and Mr Hyde.

It is very easy to come into a hard riding mode on tighter country roads and pass cars one by one or a hole bunch twisting throttle a lot with almost a sonic bang for the snails driving the cars!!

This exhaust can really make the horn to grow out of your forehead!! The corners are thrown right into your face so improved brakes is a good thing!

My carbs and engine (Billet block 1005cc) started to breath really well with this system and all jetting had to be changed.
I'm currently waiting for the last jets to finalize the jetting project.

Kemp at Ripple Rock Racers is a very nice and service minded person. The exhaust weights very little too!
https://www.ripplerockracers.com/product/cb750-hindle-vintage-racing-exhaust-system-fits-1969-78/

Thanks! That's what I wanted to hear. First hand experience of the product. I'll rob someone and order one of these pipes. 

[MRieck]

 I would just like to tag on what Per said about Kemp at Ripple Rock. He is a great guy to speak with and deal with.....a real straight shooter.

[Leino]

Could either of you measure the diameter of the pipe? I have an old silencer I'd like to use.

[PeWe]

51mm OD.

I also compare with the shorter and according to Kemp much louder baffle.
I have not tested it.

The hole thru the baffle is nice. Strange the silencing function work with low throttles.

It has a bracket for 69-76 frames.
The later need a higher mount, other order option.

The pipe take the passenger foot pegs.
I have other model clamped on frame from Yamiya.

Shorter with its welded bracket.




The longer one look same inside

You might get a future regret if not order a complete setup

[PeWe]

One detail, the rear always stay cool and do not get the bronze color. Well insulated inside, no risk that passenger boot sole melt if in contact.

[MRieck]

Nice pics Per.

[Leino]

One detail, the rear always stay cool and do not get the bronze color. Well insulated inside, no risk that passenger boot sole melt if in contact.

In my opinion, riding with a passenger is the worst waste of time you can get yourself into on a motorcycle. 
Ride your own or stay at home. 
Back in 2003 we modified the rear foot pegs so my son (5 years old back then) could reach them. Now I'm gonna drop them lower but nowhere near stock position.

 Thank you very much for the pictures and measuring! 

[PeWe]

My photo of pipe measured is the OD of pipe just before going into the muffler. It look like OD of muffler.
The thickness of tubing, very thin.

Mike, which model do you have?
It's for your CB750F, right?
End style of muffler?

[Leino]

I'll use this. Just like I did back then. Two reasons: 1. I love the sound 2. Most people say I shouldn't use it

20200427_192311 by Juha Leino, on Flickr

[PeWe]

Leino, check with Kemp about using a clamped pipe.
The Hindle use very thin stainless steel, no clamps used at all. Only very snug fitting, like a golf glove. All pipes stays with help of springs.
The thin material might collapse if using a clamp as used on pipes with double thickness.

It might be adaptors for clamped pipe with thicker pipe for the clamp if it is an issue.
/Per

[Leino]

Leino, check with Kemp about using a clamped pipe.
The Hindle use very thin stainless steel, no clamps used at all. Only very snug fitting, like a golf glove. All pipes stays with help of springs.
The thin material might collapse if using a clamp as used on pipes with double thickness.

It might be adaptors for clamped pipe with thicker pipe for the clamp if it is an issue.
/Per

Thanks Per. I'll make an adapter pipe anyway.

[Sam Green Racing]

Can springs be fitted Juha ?

[MRieck]

My photo of pipe measured is the OD of pipe just before going into the muffler. It look like OD of muffler.
The thickness of tubing, very thin.

Mike, which model do you have?
It's for your CB750F, right?
End style of muffler?

Sorry Per....just noticed this. My set up is exactly like yours.

[Leino]

Can springs be fitted Juha ?

Oh yes Sam. Springs to the bottom end and a thicker part to the other end where the silencer is clamped to.

[750K5]

Just noticed Hindle exhaust is available again. Anyone have one of these reproduction pipes?

I have one but it is sitting in the box.

My bike has a Hindle 4-2-1 with long muffler and classic tip. I have a short muffler in a box, though   I could not resist to order both while order.

It work really fine.
I have had several carb testing rides the last weeks testing the very first 1-2mm throttle lift with different jets.

Bike runs really silent then in legal speeds! Just a humming sound.
Completely different when twisting! Like Dr Jekyll and Mr Hyde.

It is very easy to come into a hard riding mode on tighter country roads and pass cars one by one or a hole bunch twisting throttle a lot with almost a sonic bang for the snails driving the cars!!

This exhaust can really make the horn to grow out of your forehead!! The corners are thrown right into your face so improved brakes is a good thing!

My carbs and engine (Billet block 1005cc) started to breath really well with this system and all jetting had to be changed.
I'm currently waiting for the last jets to finalize the jetting project.

Kemp at Ripple Rock Racers is a very nice and service minded person. The exhaust weights very little too!
https://www.ripplerockracers.com/product/cb750-hindle-vintage-racing-exhaust-system-fits-1969-78/

The Hindle exhaust looks great! A couple questions.. Would I face tuning issues using this setup on a stock bike? 
Are the rear passenger pegs removed?  Can the pegs be installed with this setup?
What handlebars are you using? Are they drilled for control wires?  I like the lower profile and am trying to decide on bars.  Are they similar to the rise on the 72' 750?
Thanks in advance.

[76ss]

Gsxr carbs interesting

[Leino]

Gsxr carbs interesting

Like Turboguzzi said, nice carbs but they are getting hard to find and some people selling them seem to think they are made of gold. I happened to have a set in good shape so why not use them 

[Leino]

I wasn't happy with the swingarm even though it was modified, so I ordered a Bimota replica from JL Meccanica. 

[Leino]

Early and late model output shaft.
20210424_180801 by Juha Leino, on Flickr

And after machining.
20210427_142628 by Juha Leino, on Flickr

[RAZZ]

For putting a late output shaft in a early cases or ?

I was trying to look up JL meccanica not much info to find on the swingarm.. is it a local Finish fabricator ? I might need a upgraded swingarm for a project -Finland is not that far from me in Copenhagen and there is no extra import taxes so Can be a solution to look in too


Sent from my iPhone using Tapatalk

[Leino]

For putting a late output shaft in a early cases or ?

I was trying to look up JL meccanica not much info to find on the swingarm.. is it a local Finish fabricator ? I might need a upgraded swingarm for a project -Finland is not that far from me in Copenhagen and there is no extra import taxes so Can be a solution to look in too


Sent from my iPhone using Tapatalk

Yes. It gives a little more offset and different sprocket mounting.
JL Meccanica is a small local company, mainly working on classic road racing frames and bikes.
This particular swingarm is made to order like pretty much anything you care to ask for.