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General Chatter / Re: Rd350 AC caliper flange ?
« Last post by dalvipravin81 on Today at 03:25:32 AM »
Hey ,

Yes I also have gone through these steps but the challenge I had was I was unable to put the screw in the dam olive ... either the scre was soft or the olive metal is hard enough  :( so finally had to drill it out .. thankfully I had a spare caliper to try first before doing it on the working one ...

Also replaced the oil seals and the brake feels better .. only one thing remains is to bleed it from the caliper as I didn't have the small diameter transparent tube to attach to the bleed nozzle ... dont want to ruin the paint on fork bottoms or RIM :( will do that in cpl days !!

 I normally stay the same range like yours more in that 4k to 6K band .. here in Mumbai 25C is a winter MAX and summer it goes to 37C :(.. I miss the snow in Mumbai :(

Will Hotter plugs like B6HS or so help burning the old residue faster ?

General Chatter / Re: MZB - Without battery - Which ones to ground ?
« Last post by dvsrd on Today at 02:29:47 AM »
I run 3% pre-mix in my RD350A. Stock pipes, but YZ125 reeds, 6 mm reed spacers, Y-boot and big K&N, and Powerdynamo CDI. I just use a fairly cheap synthetic from an auto supply Chain, most likely something they have re-branded. I am sure the Gulf oil you use is at least as good.
Obviously, it all depends on how you ride, and mayne on temperatures a well. I mostly stay between 4000 and 6500 rpm, in temps between 5 C and 25C. Where I live 25C is a scorcher :) Today is around 0C outside, and 60 cm of snow (2 ft)
Thanks dvsrd  LOL

Ok to add to this I am using 93 OR  97 Octane fuel which is called as SPEED93 or SPEED97  in India
And I use Gulf 2T Oil .. the green pouch attached is the pic ... Synthetic 2T Oil

Setup as of now ,

MZB Ignition without battery 2MM BTDC
30 Pilot 180 Mains  .. needle second from TOP -- leaner than middle position
DG Chambers

Turning Wrenches / Re: What master cylinder for dual calipers?
« Last post by dvsrd on Today at 02:18:47 AM »
I would a think more like 20mm.  13 works very well with the stock caliper with much more feel.  I don't think 17 is enough.
I disagree. Do the math. If you want to maintain the same ratio as single caliper/13 mm master it will be like this:
No need to work out actual piston areas, just use master diameter squared:

13 squared is 169
Multiply by two, that gives 338
Square root of 338 is 18.4.

Now, 18.4 is based on 13 mm being the optimal for a single RD caliper, which I am not too convinced about.
Also, in many cases, the master/caliper ratio is not neccessarily the same when comparing single vs. dual setups using the same calipers. Theoretically, a dual disc setup with identical ratio would require the same squeeze at the lever as a single setup, leaving thermal capability as its only real advantage. (i.e racing With lots of braking)  In fact, if you should want to double the brake force while keeping the same squeeze, you should keep the same master....
General Chatter / Re: Im in cali for a few days. (Anaheim area)...
« Last post by arnieward on Today at 02:08:04 AM »
I live in Northern California but about 400 or so miles away, so its a little far to go for a beer.  You should get your head out of 2 strokes for a couple of days anyway and enjoy the "culture" of LA, haha! But there should be a lot of things you can do there.  I would check the concert and music scene out there.  Lots of talent down there.  And every kind of music including bluegrass you can imagine.  Have fun!
General Chatter / Re: MZB - Without battery - Which ones to ground ?
« Last post by dvsrd on Today at 02:03:46 AM »
What is your premix ratio in to one ( __:1)
I don't understand  30ml to 1L?
Come on Chuck, embrace the metric system :) 
1 l Equals 1000 ml (milliliter) So 30 ml per liter is 3 percent.
General Chatter / Re: MZB - Without battery - Which ones to ground ?
« Last post by dalvipravin81 on Yesterday at 11:46:33 PM »
Befor this there was a local CDI which in a months time gave me issues and bike was not pulling past 3 K RPM and running way rich .... plugs Pitch DARK ... basically current was not strong enough to burn the fuel and all that oil in the crank now has to burn out from exhaust :(

@Supertune .. the premix is 30ML oil per 1000 ML Petrol ... so i can say 1000:30 ? or 33:1 ?

Turning Wrenches / Re: dyna ignition coils
« Last post by teazer on Yesterday at 11:19:22 PM »
"Big" Dyna coils in 5 ohm resistance are perfect for any points or simple electronic ignition. Their small coils say they have low inductance and they say are not suitable for points or Dyna S type ignitions. 
Turning Wrenches / Re: What master cylinder for dual calipers?
« Last post by teazer on Yesterday at 11:17:49 PM »
My interpretation of the Vintage Brake chart is 20mm would be right.  I had a TZ once with twin RD calipers and TZ750 disks and the brakes sucked and the front end was heavy and choppy. Never again.

With aluminum repops I might be tempted to try again, but single disks are enough to chirp the front tire with the right master cylinder.

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