HPI ignition install

[m in sc]

got it. wasnt clear in pic. 

[rd400canuck]

Hi guys,

Are these HPI's keyed to the crank?

[Czakky]

Not keyed, taper fit.

[rd400canuck]

ok TY...


One more question.... Doesnt my 1976 RD400c have a voltage regulator in it I can use or do I need to buy one for this HPI system as well?

[SUPERTUNE]

Have to use a aftermarket one, stock one won't work.
I'll have to come back and finish my HPI install post.
Chuck

[quocle603]

Just ordered an HPI from treatland. Can't wait to add this to my bike this winter.

[quocle603]

you'll need a 2 input rectifier. you also will probably need to unground the winding to get the voltage you need unless you are ok running ac lighting (which is what i did)

something along these lines will do:

https://www.ebay.com/itm/80-amp-Full-Wave-Bridge-Rectifier-KBPC8010-For-converting-AC-to-DC-hho-use-80a/282314579822?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D60037%26meid%3Df0678ba4f0d346e9b23d767e490a7af7%26pid%3D100005%26rk%3D2%26rkt%3D12%26mehot%3Dag%26sd%3D283584947234%26itm%3D282314579822%26pmt%3D1%26noa%3D0%26pg%3D2047675&_trksid=p2047675.c100005.m1851

I got a 50a bridge rectifier laying around, will that suitable?

[SUPERTUNE]

Looks to me as a rectifier only.
Now you'll need to find a standalone regulator.
I wouldn't spend my time on it. I need things to go easy, not harder and eat time experimenting.
Vintage RD building do that enough already!
Chuck

[m in sc]

it will work. however as chuck said, it will need a regulator as well.

as a rule of thumb, rectifiers eat about 30% of voltage from ac to dc. it doesn't really eat it, but clips the wave.., but if you check before and after adding a rectifier, you lose a minimum of 30 % voltage ac to dc measured.

that being said, floating a ground off the hpi and having 2 wire out, will give 2 legs of ac. this can go to a 2 wire rect/reg . or just use the one supplied with the unit. this means ungrounding the grounded leg of the winding and adding a wire and running it out of the motor.

Me? i have time to do this so can experiment, i get why chuck doesn't want to delve into unknowns, completely understandable.

Happy thanksgiving all

[quocle603]

I completely spaced that I was ordering from a specialized moped company, where batteries and DC voltage is not a thing and ordered the AC voltage regulator only.

I will try running it with the rectifier into the regulator. If that doesn't work then I will try one of those R/R that I have laying around.

[rd350mississauga]

I am only getting 5 Volts AC from the yellow "LIGHT OUT" from the stator. Any advise on whats wrong?

[m in sc]

at what rpm?

[rd350mississauga]

I will check today and revert the voltage at different rpms.

In the meanwhile, I read on treatlands that i need a resistor type sparkplug or a resistor boot. Should i buy this ->

https://www.ebay.com/itm/NGK-Spark-Plug-Resistor-Cover-Cap-Boot-NEW-LB05F-Motorcycle-Elbow-5k-Ohm/202777608821?fits=Model%3ARD350&epid=26017010018&hash=item2f367cc275:g:z4AAAOSw7I5TsZP4:sc:FedExHomeDelivery!14305!US!-1

Also, on another page, i saw that the member bought a rectifier+regulator, will this help me to hook up the hpi unit to the battery to power everything  ->
HPI is out of stock on their R/R, and thats almost a 150 bucks as well. This one on ebay is 10 bucks.


https://www.ebay.com/itm/4-Wire-Full-Wave-Silver-Motorcycle-Regulator-Rectifier-12V-DC-Bike-Quad-Scooter/292689887133?pageci=9699c8a5-f3b7-4164-8330-44b7047f5d53&epid=828261382

[bitzz]

... or you could use a resistor type plug. Same end result.

[rd350mississauga]

Thanks, how about the R/R?