marcus mcc Yes I did check the ignition, just as a precaution. And I don't know yet, I feel like it's stronger at low rpm's but I haven't opened the throttle yet. I need to resist the urge to feel the results until I've made the first 400km
Well I would love to run a hydro clutch on mine as well. Lines and fittings are easy. But did you use any particular parts of any other bikes? What about a matching master? Did you machine the cover? Do I need a special push rod? Thanks for your help
whiteciv I used a pump/lever/master cylinder (or what it's called) from a YAMAHA fz750 so it would match the brake master cylinder on the other handle, wich is also from an fz750. this is how I got idea to make an hydraulic clutch. The important thing is that the plunger diameter corresponds whit that of the master cylinder. So you have a couple of measurements to do in order to calculate the correct plunger diameter for the actuating plunger. So there are 2 dimensions that determines the plunger diameter, assuming off course that the liquid is non-compressible, that is the displacement volume of the master cylinder and the stroke of the pushrod of the clutch. I used an large plastic syringe wich i connected to the master cylinder and filled it up to half way whit oil and by pumping I could measure the displaced volume. And the stroke can be measured whit the clutch cover removed or with (on an rd400 for example) on the old wormweel kind of thing. On my rd400 the stroke was 1.9mm. Then you can calculate the diameter of a cylinder because you have the volume and the height. I recommend using EPDM as rubber compound because it's the same as in master cylinders can be found and it's one of the few compounds that can resist brake fluid. Don't try different fluids, use what's recommended for that handle, usually dot 4. And yes I machined the plunger and housing myself.
Because my previous manifolds didn't have the balance pipe and I wanted to know exactly what difference it made. So I plugged it up at first so I could experience what all the other modifications gave me, after that I installed the balance pipe and it put all my other mods to shame. By far the easiest hp's I ever gained!
No problem! 70 horses at the wheel is really something! I'm currently more busy with my 50cc race engine, wich gives 19 rwhp... Wich may not sound like much but on a 67kg bike with narrow slick tires is really something else to ride. If you haven't I recommend checking my other videos.
@@Drenth_Engineering 19 hp is super. I will look at your bike video. ruclips.net/video/aARxCbLdZ6E/видео.html This should be my bike video at the dragstrip.
Wow, everything you did looks spot-on, but those rear-sets take the biscuit.
Thanks a lot man ;)
looks good, did your reeds make much difference? have you checked your ignition timing?
marcus mcc
Yes I did check the ignition, just as a precaution.
And I don't know yet, I feel like it's stronger at low rpm's but I haven't opened the throttle yet.
I need to resist the urge to feel the results until I've made the first 400km
Well I would love to run a hydro clutch on mine as well. Lines and fittings are easy. But did you use any particular parts of any other bikes? What about a matching master? Did you machine the cover? Do I need a special push rod? Thanks for your help
whiteciv
I used a pump/lever/master cylinder (or what it's called) from a YAMAHA fz750 so it would match the brake master cylinder on the other handle, wich is also from an fz750. this is how I got idea to make an hydraulic clutch.
The important thing is that the plunger diameter corresponds whit that of the master cylinder.
So you have a couple of measurements to do in order to calculate the correct plunger diameter for the actuating plunger.
So there are 2 dimensions that determines the plunger diameter, assuming off course that the liquid is non-compressible, that is the displacement volume of the master cylinder and the stroke of the pushrod of the clutch.
I used an large plastic syringe wich i connected to the master cylinder and filled it up to half way whit oil and by pumping I could measure the displaced volume.
And the stroke can be measured whit the clutch cover removed or with (on an rd400 for example) on the old wormweel kind of thing. On my rd400 the stroke was 1.9mm.
Then you can calculate the diameter of a cylinder because you have the volume and the height.
I recommend using EPDM as rubber compound because it's the same as in master cylinders can be found and it's one of the few compounds that can resist brake fluid. Don't try different fluids, use what's recommended for that handle, usually dot 4.
And yes I machined the plunger and housing myself.
Do you have an Instragram account?
whiteciv
No I don't, why?
nice work
have you got some pictures of your old pistons?
What's the original purpose of the small hole just above the exhaust port in the cylinder?
It's some sort of decompression hole to maybe make it easier to start, idle and/or to decrease the compression at low rpm's.
Does the hole over exhaust port increase exhaust flow at high rpm? Is their a difference in carb jetting with and without the hole?
Done!
Why did you block the cross over tube ?
Because my previous manifolds didn't have the balance pipe and I wanted to know exactly what difference it made. So I plugged it up at first so I could experience what all the other modifications gave me, after that I installed the balance pipe and it put all my other mods to shame.
By far the easiest hp's I ever gained!
Could you explain the opening cut into the bottom of the cylinder wall And intake .
It's an extra transfer port that comes up from down in the crankcase.
Although I would do it differently next time
@@Drenth_Engineering
I'm always looking for performance tricks for my rd400 race bike 🚲 curently making 70 rwhp.
Good luck on your bike progect.
No problem! 70 horses at the wheel is really something!
I'm currently more busy with my 50cc race engine, wich gives 19 rwhp... Wich may not sound like much but on a 67kg bike with narrow slick tires is really something else to ride. If you haven't I recommend checking my other videos.
@@Drenth_Engineering
19 hp is super.
I will look at your bike video.
ruclips.net/video/aARxCbLdZ6E/видео.html
This should be my bike video at the dragstrip.
Would you be able to help me with some info on your hydrolic clutch on the 400??
whiteciv
Yeah sure, what would you like to know?
whiteciv
You can look me up on Facebook, Sacha Drenth
Hey Sacha. i emailed you at the email you let me know about, but i don't know if you received it!
I was going to DM you to speak to you
Sorry boss. I don't have a Facebook account !