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deltas69
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1#
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(Date Posted:04/28/2004 03:05:58)
Reply to : Murray Gray
Since I am probobly the only Trials guy left, I will post something here so it won't feel so lonely...I will soon be looking at changinga TL engine over to electronic ignition perhaps this summer and could use some help identifying possible donor engines...Thanks in advance...
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pj
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deltas69
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2#
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(Date Posted:04/28/2004 03:09:54)
well murray.welcome back.guess i'll keep an eye out for TL stuff in my little corner of the board so graciousally (did i spell that rite)??....alotted me by bob and geoff.......there's a post in another area about electronic triggers now.look above.might point you in the right direction....
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pj
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Murray Gray
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3#
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From: USA 
Registered:03/29/2004
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(Date Posted:04/28/2004 16:00:58)
Thanks...I went and looked at that thread and that discussion will take care of most of my questions...I will watch with great interest...
I have one running and competing TL and will be getting a 300 the end of may...
Thanks again...
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Murray Gray
'76 XL330, TMI250, '87 TLR200
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Nova Scotia Mike
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4#
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(Date Posted:05/22/2004 15:08:16)
I've always been intrigued by trials (I used to freestyle bmx about a hundred years ago). There is a new gas gas gealer around the corner form my house now too.
The gearing on these bikes looks unbelievably low ... to go at a walking pace, do you need to feather the clutch? Or can you dump the clutch and crawl along? How mant gears do TL's even have? Disc brakes up front and in back? Any online pics of you "in action"?
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Nova Scotia Mike
Thumpers are the BEST!!!!!
"03 DR-Z 400S, "77 XL 350, "87 CBR 1000f, "90 EX 500, "79 CM 185
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ricortes
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5#
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(Date Posted:05/22/2004 17:01:50)
Do you have a lot of reasons why you want to go solid state?
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Murray Gray
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6#
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(Date Posted:05/23/2004 14:57:08)
For Mike...
Yea sometimes on REALLY tight turns you need to clutch, but most others it is just gearing and weight management...
As far as the CDI...I think some of the infamous "flat spot" is related to ignition...
BTW...
I just brought home the latest...a custom framed 298 with a Montesa (35mm) front end...bike sat for a couple of years and so I am going through the usual stuff before running (oil change, carb clean, etc.) will keep you all updated...
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Murray Gray
'76 XL330, TMI250, '87 TLR200
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Hacksawed
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7#
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(Date Posted:05/25/2004 04:56:41)
Mike, you do not have to slip the clutch to go at a walking pace on a properly set up trials bike. It's all in the gearing. Even a novice should be able to make locked ( forks turned against the fork stops) turns on level ground with out slipping the clutch, again on a properly set up bike.
The TL250 has a 5 speed gear box and has shoe brakes front and rear.
Personaly, I think the "off idle cough" has more to do with flow (at the head) than ignition.
Keep in mind that just because a CDI unit can be made to "fit" a TL, it's advance curve might not be suited for trials work.
HTH hacksawed
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Murray Gray
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8#
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From: USA
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(Date Posted:05/25/2004 15:24:27)
Dear Hacksawed...
There are two schools of thought and that is to clutch or not to clutch, I personally am not advanced enough yet to use the clutch in the sections and am using a 14/60 gearing, but have been told from many directions to learn to use said clutch, at this point I don't know enough to argue...some say clutch, some say not...who's right...???
as far as the CDI, again...I don't know, at best I get a weak spark from all (5) of my stock coils...I have read that the TL's (and XL's) are VERY picky about timing, I have, in the past, gotten my XL not to cough...once...the cough does get worse as the temp rises...perhaps I can try it one of my "test beds"(one of the other four TL's engines I have)...
BTW... I once saw Mick Andrews ride a Greeves through an intermeate section with one hand...the other was held behind his back...guess thats why he was a world champion...I don't ride that well...yet...
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Murray Gray
'76 XL330, TMI250, '87 TLR200
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ricortes
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9#
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Rank:none
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Posts:408
Registered:05/01/2004
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(Date Posted:05/25/2004 21:08:28)
Have you ever considered going to a straight Kettering battery/coil ignition for testing?
It's pretty simple:
1 Get a coil with internal resistor. Alternatively you can salvage a resistor out of a car or buy one.
2 Get a battery with the same voltage as the coil.
3 Hook the + terminal of the battery to the coil + side.
4 Hook the negative terminal of the coil to the wire coming out of the points cover of the Honda.
5 Hook the negative terminal of the battery to frame.
6 Put the wire of an automotive type cap on the negative terminal of the coil and ground the can part.
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Hacksawed
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10#
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Registered:05/24/2004
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(Date Posted:05/26/2004 06:58:51)
Murray, A few years back I attended a school Mick Andrews was running at Bob Ginder's place. A friend of mine kept slipping his clutch to get through a section. Mick kept fussing at him to stop using the clutch and Randy swore it was impossible to make it through the section without it. Mick took his bike (a Greeves BTW) and rode the section with his clutch hand off the bars. Shut my friend up for the rest of the day. Small world isn't it? I don't remember you being there but my memory is getting pretty bad these days. I was the old man on the TL250
Mick told us Sammy Miller had used a stick to slap the clutch hand of riders using the clutch in sections at his schools. But like you said, " Who knows"?
Mike's question was "did you need to feather the clutch to start off at a walking pace", I answered no. I'll stick to that.
On your answer as to slipping the clutch on REALLY tight turns, I still say you should be able to make full lock turns on level ground with out using the clutch. Now, if you really want to make REALLY tight turns you need to learn how to do a "flick" turn. Which is some what advanced and a completely different technique than the one used to make full lock turns. Keep in mind that vintage trials in the US is a "no stop" event so at best your just trying to slow down when slipping the clutch most of the time to SET UP for the next turn or obstacle.
I've found that in 30+ years of trials riding I do use the clutch from time to time to control speed. Most of the time I'm trying to slow down after going over an obstacle and I'm needing to make a quick turn with little recovery room. So, I do agree that you need to learn clutch control, it is an important skill to master.
As far as your "cough" getting worst as the engine warms up, I can't imagine what the ignition might be doing to cause that unless your coil is bad and is breaking down with heat, but all five coils being bad at the same time sounds suspect. I'd still be looking for problems in the top end. My bet is your burning some oil from time to time?
There are a lot of good reasons to go with an electronic ignition. Set them up and go. No points or auto advance units to wear out. But be forwarned when they go bad your dead in the water until you get another. There's no quick sanding them clean and off you go. Also do your home work and be sure you find a unit that matches what your auto advance does for you now. (check the specs for the donor and compare them to your bike's specs)
I'm too old to ride much anymore, I do ride around the farm a bit but not as much as I'd like. I'm a Honda fan and own several Honda thumpers including a couple of TL250s, one I purchased new late in 1975. So I've BTDT
Good luck, hacksawed
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Murray Gray
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11#
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Rank:none
Score:357
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From: USA
Registered:03/29/2004
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(Date Posted:05/26/2004 16:01:43)
Dear Hacksawed...
You got me on that one, it was indeed Randall Witt's story I was relating to make a point and for this I apologize.
Rest assured I will never attempt to answer anyone's questions again...
PS
Last Friday Bob told me to start learning to use the clutch...go figure...All of you BTDT guys sure know how to confuse this 49 year old beginner...
"So long and... thanks for all the fish"
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Murray Gray
'76 XL330, TMI250, '87 TLR200
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