View previous topic :: View next topic |
Author |
Message |
Top-shaggy Show Star !
Joined: 05 Mar 2011 Posts: 1757 Location: Derbyshire
|
Posted: Fri Feb 13, 2015 11:22 pm Post subject: |
|
|
Upgrade ???
_________________ We are where we are... |
|
Back to top |
|
|
emzedder
Joined: 15 Dec 2006 Posts: 324 Location: E.Anglia
|
Posted: Thu Mar 12, 2015 8:00 pm Post subject: |
|
|
Front brake upgrade kit installed on the MZ ....
_________________ If it don't ring-a-ding-ding it ain't worth a thing |
|
Back to top |
|
|
Gillinghampaul
Joined: 15 Aug 2012 Posts: 655 Location: Kent
|
Posted: Thu Mar 12, 2015 8:45 pm Post subject: |
|
|
Is this turning into the woefully inappropriate upgrades thread? _________________ Gagging for it |
|
Back to top |
|
|
Gillinghampaul
Joined: 15 Aug 2012 Posts: 655 Location: Kent
|
Posted: Thu Mar 12, 2015 8:47 pm Post subject: |
|
|
Or even this?
Both get my approval i like little bikes with big engines! _________________ Gagging for it |
|
Back to top |
|
|
arlurt Show Star !
Joined: 28 Nov 2006 Posts: 680 Location: North Yorkshire
|
Posted: Thu Mar 12, 2015 9:46 pm Post subject: |
|
|
Certainly made me smile! _________________ Light is right. |
|
Back to top |
|
|
emzedder
Joined: 15 Dec 2006 Posts: 324 Location: E.Anglia
|
Posted: Fri Mar 13, 2015 6:11 pm Post subject: |
|
|
Get twenty miles out of a rear tyre? _________________ If it don't ring-a-ding-ding it ain't worth a thing |
|
Back to top |
|
|
arlurt Show Star !
Joined: 28 Nov 2006 Posts: 680 Location: North Yorkshire
|
Posted: Fri Mar 13, 2015 6:38 pm Post subject: |
|
|
Looks like the bottom one is actually a trike? _________________ Light is right. |
|
Back to top |
|
|
Gillinghampaul
Joined: 15 Aug 2012 Posts: 655 Location: Kent
|
Posted: Fri Mar 13, 2015 8:02 pm Post subject: |
|
|
I dont think id stay on it long enough to need to worry about how long a rear tyre lasts! On the plus side i bet you never need a front tyre, it will never be on the floor! _________________ Gagging for it |
|
Back to top |
|
|
emzedder
Joined: 15 Dec 2006 Posts: 324 Location: E.Anglia
|
Posted: Tue Aug 04, 2015 8:09 pm Post subject: |
|
|
July was a bit damp, still been hooling around Norfolk, this was one of the least wet days ... August been good so far!
_________________ If it don't ring-a-ding-ding it ain't worth a thing |
|
Back to top |
|
|
DSBBadmin Site Admin
Joined: 13 Nov 2006 Posts: 717
|
Posted: Wed Aug 05, 2015 8:25 am Post subject: |
|
|
This was for sale at Cadwell, it belongs to reverse cylinder jim on here. Lot of nice touches on it, pretty cool.
|
|
Back to top |
|
|
emzedder
Joined: 15 Dec 2006 Posts: 324 Location: E.Anglia
|
Posted: Fri Aug 07, 2015 7:21 pm Post subject: |
|
|
Nice, all the right stuff. Too smart for me .....! _________________ If it don't ring-a-ding-ding it ain't worth a thing |
|
Back to top |
|
|
ajb235
Joined: 11 Aug 2015 Posts: 2 Location: Yorkshire
|
Posted: Wed Aug 12, 2015 4:27 pm Post subject: ETZ250 mods |
|
|
Hi, I,m new here, but looking at major mods to my ETZ 250' which I wanf to use on the road as a cafe racer, rather than racing.
Two big things to do
1. Reed valve : Is there a thread on this forum (or anywhere )that shows just how this is done?
2. Exhaust : I' m going to fabricate an exhaust system that will unleash the true potential of these engines.
Would appreciate any guidance, reed valve procedure is the main thing.
Thanks |
|
Back to top |
|
|
emzedder
Joined: 15 Dec 2006 Posts: 324 Location: E.Anglia
|
Posted: Thu Aug 13, 2015 5:26 pm Post subject: |
|
|
Things to do that make a difference that I can help you with:
1. Replace the heavy MZ piston with a Sukuki TS250 alternative ... much lighter gudgeon pin is straight fit
2. Shorten barrell top and bottom to match Suzuki piston crown and skirt lengths
3. Re port as necessary for (2)
4. Trim lots of weight off clutch ... preferably with alloy clutch outer
5. Reed valve ... can increase inlet opening time massively but need to know what you doing on porting. Use a 4 petal RD unit as that is good enough. Quite a bit of machining unfortunately
I'll send you my port map if that is helpful _________________ If it don't ring-a-ding-ding it ain't worth a thing |
|
Back to top |
|
|
ajb235
Joined: 11 Aug 2015 Posts: 2 Location: Yorkshire
|
Posted: Thu Aug 13, 2015 9:27 pm Post subject: ETZ250 tuning |
|
|
Thanks for the information, some useful advice there,which I will follow. The port map would be even better, no substitute for experience!
Thank you. |
|
Back to top |
|
|
emzedder
Joined: 15 Dec 2006 Posts: 324 Location: E.Anglia
|
Posted: Fri Aug 14, 2015 6:16 pm Post subject: |
|
|
No problem, trick is to get some more power while not sacrificing reliability and starting (the old chesnut for strokers) my setup gives a more exciting ride but no lap records. Boring the carb by 1mm is beneficial but better to go for an appropriate Mikuni if you can afford it.
I have fitted a Kart PVL ignition which has been brilliant but is not cheap. Run slightly retarded ignition from standard to start with and slowly advance until you get a good response.
I have boost ports which make a difference but a tricky machining task ...worth the effort
Pipe is all about maths but I have a generic dimension setup if you would like that. Message me your mail address. _________________ If it don't ring-a-ding-ding it ain't worth a thing |
|
Back to top |
|
|
|