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1976 yamaha AG 175

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Replied by MarkT on topic 1976 yamaha AG 175

Nice work. I wish we could get that large tank here in the US. Wonder if it would fit a CT1?
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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06 Sep 2020 15:35 #131

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Replied by s900t8v on topic 1976 yamaha AG 175

the bike is essentially a Ct1 with bigger tank, and dfferent gearset, everything else is the same, oh and no tacho
1976 Yamaha rAG175
1969 Yamaha L5T
06 Sep 2020 16:18 #132

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Replied by s900t8v on topic 1976 yamaha AG 175

well I am going ot be experimenting with a few different CDI's to see if any of it changes performance.

currently it has an ag175 cdi unit which I am presuming is a static curve unit. its a 4 wire CDI so I am presuming it is the same as the RX100 CDI which is also 4 wire. I dont know of any other 4 wire systems, anyway the RX100 is static 20 degrees, I'k going to try a blaster 5 wire CDI unit, it slightly less timing and a bit of retard at higher RPM so if I do indeed have an RX CDI I might notice a performance drop going to blaster CDI. The 5th wire on blaster is for a ground, the rest of the CDI unit is the same.
1976 Yamaha rAG175
1969 Yamaha L5T
06 Sep 2020 22:49 #133

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Replied by s900t8v on topic 1976 yamaha AG 175

well I am going ot be experimenting with a few different CDI's to see if any of it changes performance.

currently it has an ag175 cdi unit which I am presuming is a static curve unit. its a 4 wire CDI so I am presuming it is the same as the RX100 CDI which is also 4 wire. I dont know of any other 4 wire systems, anyway the RX100 is static 20 degrees, I'k going to try a blaster 5 wire CDI unit, it slightly less timing and a bit of retard at higher RPM so if I do indeed have an RX CDI I might notice a performance drop going to blaster CDI. The 5th wire on blaster is for a ground, the rest of the CDI unit is the same.
1976 Yamaha rAG175
1969 Yamaha L5T
06 Sep 2020 22:49 #134

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Replied by Tex on topic 1976 yamaha AG 175

Looking good. My AG175 project has stalled, gotta get motivated!

Tex
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07 Sep 2020 04:05 #135

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Replied by MarkT on topic 1976 yamaha AG 175

Two strokes like retarded timing at high RPM for performance.
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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07 Sep 2020 06:57 #136

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Replied by s900t8v on topic 1976 yamaha AG 175

Yeah I wonder why but I’ve sorta read that retarding the timing st high rpm can improve peak hp. this goes against 4t tuning. I can only assume that the retarded timing throws more heat and exhaust gas into the exhaust which props up the expansion chamber baffle/return wave supercharging the cylinder at high rpm. It’s definitely not pinging at high rpm as is. But keen to try a few different curves out. Might try an unrestricted pw50 cdi as wel.
1976 Yamaha rAG175
1969 Yamaha L5T
09 Sep 2020 02:24 #137

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Replied by s900t8v on topic 1976 yamaha AG 175

well I leave the bike for a few months and more things break

finally got around to remaking the throttle cable the old one was sticky, I use teflon dry lube these days on cables and it works a treat.

also had to replace the front brake lever the perch was broken dont know how, and then I also had to wire in a new front brake switch

then I went to try to start it and no spark, the stupid kill switch had somehow decided to pack up on me in the process! bloody crazy cant believe how many things have gone wrong since its been off the road!

i think the bike has had a taste of the good life living in the shed for the last 2 years and is putting up a big fight to avoid getting re-registered lol

hopefully get it in for roadworthy in the next week or two then put it on club plates again

I really miss riding, in the last 6 months i've realised how much it just cheers me up if ive cracked the shits at something !
1976 Yamaha rAG175
1969 Yamaha L5T
Last edit: 27 Nov 2020 03:49 by s900t8v.
27 Nov 2020 03:48 #138

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Replied by Grussell on topic 1976 yamaha AG 175

I think it may be punishing you for ignoring it. These old bikes like lots of attention...
1978 DT400
1975 DT250
1976 YZ125C (in progress)
1976 YZ125X (in progress)
2018 YZ250FX (my race bike)
2010 Triumph America (my cruiser)
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25 Jan 2021 17:40 #139

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