I need a wiring diagram for a 1971 triumph bonneville 650.

SOURCE: i need a wireing diagram for 1971 triumph tiger

try this link >>>

http://sunnymeadcycles.com/files/British_Wiring.pdf

SOURCE: What type of spark plug does a 1971 triumph

NGK B8ES
Champion N3
Lodge HLN
KLG FE100
All have 14mm thread diameter & 3/4" reach
Gap is 0.025" (0.64mm)

Ride safe
Bike-Doc
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SOURCE: re wired 1971 650 triumph up dated electrial on

Did you use a Typanium Recitifier? There should be no problems unless it is a used one. All the new ones I havew used just "bolt on" .. there are 5 wires. Check to see if you don't have a grounded wire some where.. try it with the head light off.. I usually wire my bikes to start with no head light with a 3 way switch.. once running I can then turn the light on. Go through an check all your wires again, you might just have a bad connection somewhere.. here is an excellent site .. Jim http://www.raskcycle.com/techtip/webdoc16.html