|
Post by buster on Sept 19, 2022 19:29:17 GMT
Jesus Paul you have the patience of a saint starting to question my own sanity Carl, but theres an LED on that sensor and I'v seen it switch with the north pole magnet waved at it, ordered some countersunk magnets...
|
|
|
Post by buster on Oct 4, 2022 17:54:42 GMT
been waiting forever for the magnets (phoned them yesterday, they're sending me some more as the originals appear to be lost) also this arrived today shorter design so hopefully it will fit in the limited space available, I'm also hoping that this one will operate with a south pole magnet, but thats probably too much to ask
|
|
|
Post by buster on Oct 9, 2022 16:31:54 GMT
been dying to have a go at this all week but real life got in the way anyway finally got chance for a play this afternoon. so lots of messing about and it turns out the magnet needs to be mounted in a very specific place, it needs to trigger at full advance, happily this isnt too difficult as the 400 mag wheel has a mounting screw (for the inner magnets) in the right place. something else I'v discovered is the 'wisdom of the internet' is actually wrong about these sensors, its claimed that they trigger with south pole magnets, not true, they trigger with north pole magnets (well the three that I own trigger with north pole). so counter sunk north pole magnet and sensor fitted, worth noting that thread lock would be a good idea and dont over tighten as magnets are easily broken (oops , good job I bought two) I'm still struggling a bit to understand the sensor advance, its a fixed angle, but I'm being a bit thick and cant work out what I should be measuring. having said that I'v measured 30 degrees between the F mark and TDC on the engine casing and set the cdi to that. a brief test ride up the road and it seemed to run lovely, I was more careful this time and didnt go far, only a mile or so, as I wanted to check it wasnt overheating. the advance figures programmed in look way too low, but the bike revs through really nicely. lots of checks to do before I shout eureka again but I'll tentatively say I'm getting there...
|
|
|
Post by johnfcbn44dx on Oct 9, 2022 19:20:12 GMT
Mk1 production model?
|
|
|
Post by BritPete on Oct 9, 2022 19:47:06 GMT
Does the magnet put the balance of the rotor out
|
|
|
Post by buster on Oct 9, 2022 20:15:04 GMT
Does the magnet put the balance of the rotor out not that I'v so far noticed (the magnet is very light and the screw is almost like for like) but I'v only had one brief moment up to about 8000rpm, its one of those things to keep an eye on as I go
|
|
|
Post by buster on Oct 12, 2022 13:16:33 GMT
fandangled angle finder thingy, I will get to the bottom of this
|
|
|
Post by buster on Oct 12, 2022 19:44:10 GMT
if I'm understanding the sensor advance setting properly then it goes something like this (excuse the slightly naff drawing) as the rising edge of the (north pole) magnet triggers the sensor the advance timing marks should be at TDC, this shows the magnet and sensor are mounted in the correct positions. moving the mag wheel slowly by hand until the LED lights up, then I'll measure the angle between the T mark on the mag wheel and the TDC datum on the crankcase (measured with a tape measure and calculated back into degrees and I got 48) then minus 15 degrees (initial advance 15 degrees BTDC) so by that reckoning the sensor advance should be set at about 33 degrees. cdi tweaked roll on a decent day to give it a run
|
|
|
Post by buster on Oct 13, 2022 16:25:27 GMT
just been down to the shop on it with this curve programmed in its ok, but not quite like a 400 should be. doesnt quite lift off as it should and its a bit lacking around the 30 mph mark in town. so a quick measure with the new gadget says that between TDC and the T mark is 52 degrees, so next thing to try is sensor advance at 37 degrees and I'll give this curve a go worth adding to this that the bike is now perfectly rideable, I'd be happy enough to set off on it for a full day out and all this messing with the programme is tinkering round the edges
|
|
|
Post by buster on Jan 4, 2023 8:35:46 GMT
got caught out a bit the other day while doing the injectors on the car. I came to the point where I needed to rotate the crank to set the inlet tappets and discovered I needed a twelve point socket , mine are mostly 6 point. so ended up nipping into town and picking this up from screwfix. not a bad little set for £35 and it did the job. the brief ride on the bike though did show that I'm still not quite there with the ignition settings, I'll have to see if I can find some motivation through january and do a bit more tinkering
|
|
|
Post by buster on Apr 2, 2023 18:11:36 GMT
so I'v taken a backwards step on this one. I finally found a 450s cdi for a price I was prepared to pay and decided to fit that. as I'v been running the 450s stator with the AC wire cut off I also treated it to a new stator (first mistake) after wiring everything up with 450s gear I had no spark. hmmm, so bit of head scratching and tried a new (secondhand 450s) coil, still no spark. tested the AC output from the 'new' stator and its totally dead, tested the old stator (with the blanked off wire) and its fine, so fitted that, still no spark . a bit of a chance accident in disconnecting the black and white wire showed that when it was earthed I could get a spark, ah ha progress thinks I but its never that easy is it? so thinking it must be a ground to run system I put a temporary earth to black and white, no spark? eh? double check my connections, joint to the coil was dodgy so cleaned and sorted, still no spark. if my hair was long enough I'd have torn a good few chunks of it out at this point. more head scratching, tried swapping the black and white wire with the green wire from the key switch, nope that didnt work, then wired an extra earth into the pick up side and bingo, I'v got a spark. tank and side panels back on and it fired up so easily that I was genuinely shocked, couple of blips on the throttle and I'm off inside for my lid and gloves and a quick test ride up the road. alls well until 4000 rpm when it starts missing like mad, hmmm, what have I done this time? well I'm not 100% sure, I'v ordered some plugs that are 450s spec, mainly to rule them out, the coil I have fitted has NGK resistor type plug caps fitted so I'll swap the leads for 450s spec jobbies. one last thought occurs while I'm writing this, maybe the cdi needs an independent link to earth? so that something else to try. the real suspect though is my pickup trigger on the mag wheel, may have to have another go at that one...
|
|
|
Post by buster on Apr 7, 2023 14:59:14 GMT
I wasnt brave enough to show you my first attempt at welding on the pulse trigger, lets just say it was pretty bad. I'll get my excuses in early with this attempt too, it is officially a right b*st*rd to weld, the two metals melt at a very different rate, so its not pretty but should be functional (in my mind) after welding and after a bit of fairly careful filing, had to make sure I didnt alter the profile of the steel strip and does it work? erm no, bugger again, still missing at 4000rpm ish. oh well back to the drawing board
|
|
|
Post by buster on Apr 10, 2023 20:07:10 GMT
so admitted (temporary) defeat in trying to get the cb450sg cdi to work, I suspect my pickup system is to blame.
so stripped that system off and decided to go back to the german DC CDI, on the way though I did briefly fit a GY6 DC cdi off ebay, the only component that was sharing with the 450 set up was the pickup/pulse generator. the bike fired up but then missed like mad at 3000rpm, 450 CDI was missing at about 4000rpm but I'd put the difference down to different ignition curves. it seems I need more understanding of pulse generators and how they are triggered.
so back to the HALL effect sensor and the german CDI, I'll tentatively say it seems really good, more on this when I can get a few pics of the components I'm now using
|
|
|
Post by andy1kenobe on Apr 10, 2023 21:58:12 GMT
From a personal point of view, I am loving this thread!
The only thought I have had is using an oscilloscope. Really is a great tool for vehicle electrics so might be a help.
|
|
|
Post by buster on Apr 15, 2023 9:09:30 GMT
finally its stopped raining, so I can get a few pics. the current set up is as follows, worth mentioning that I put my hand in my pocket and bought a set of these www.ebay.co.uk/itm/MOTORCYCLE-WIRING-3-9MM-HARNESS-LOOM-BRASS-BULLET-CONNECTORS-ELECTRICAL-400PCS/165672891852?hash=item2692dfb5cc:g:mPgAAOSwt0xjEX35&amdata=enc:AQAIAAAA8JtPd3PgsN7wr18cqoW+N6mpSle+pywRsCAgVuNalNNWmSz6RCzluN2Vrt4QoanfP/l843IP4XnTnGE5uEuYYxD04EFpHPF1xQ6Qcj6uHZ1hKgiHYoN9rTdxpKhA7NtpAPQikRoO/RgyF6tOXb11i0jzQ8mANNJXoIFara9wLMM4H/KK1+KEZBqAMq5dMXrY6pgU/I0vhaGfyTJ052tvvgmf51VruFSNaoeOjnQjKh0JORgwjbKWy2miEWPolwJ6gH2i4Wa3cBClVOzB7UI27S5OQt4+OV91bbXqhVA9lcEsaYGGRuFtg59Mq1M5aP+Cbw==%7Ctkp:Bk9SR-j9r8LwYQ&pageci=b55f67bf-7996-4b12-a455-591747316ca4&redirect=mobilethe last time I had this fitted I was running so many bodge connections that I now think thats where a great deal of my problems were coming from. connections by crimp are now at the bare minimum (though I should put one more in for the live feed to the HALL sensor) the pickup and alternator. the alternator is just that, its three wires out and it charges the battery and thats all it does. the 400 pickup is replaced with the HALL sensor, three wires, red live in, blue to ground and black is the pulse signal to the CDI the magnet is SOUTH pole and fits very conveniently to an existing screw on the mag wheel (screw needs to be a little bit longer, while being careful that it doesnt protrude on the inside of the mag wheel) the coil I'm running is a standard Superdream replacement jobby, one wire to ground and the other from the CDI mounting the CDI is a bit of a squeeze on my bike, on a Superdream I'd use the glovebox or space under the tail piece the bit that makes this work is the 12v supply (soldered in on the black wire from the ignition key connector in the back of the headlight) then run through a blade type fuse, because I'm not good enough with wiring to get it to run through the Superdreams existing fuses
|
|