Voltage Regulator/Rectifier Upgrade = Mosfet - Page 3
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Thread: Voltage Regulator/Rectifier Upgrade = Mosfet

  1. #21
    Super Moderator longdistancerider's Avatar
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    Quote Originally Posted by amoeba76 View Post
    hey dudes, trying to gather info for my cafe project to plan the work and parts... so you guys sayin stock regulator rectifier won't work right with LED headlight, tailight, signals? as in plug n play? do i need to buy some weird conversion device to run all the leds? original flasher ok or need something to flash the leds? readin weird effects experienced on here
    This mod isn't needed to run the LED lights since most of those will handle up to 18V. This mod is for preserving the non lead acid batteries that are sensitive to charging voltage over 14.5, most call for 14V max.
    To run the LED turn signals you will need a LED type flasher and if you're using the stock turn signal indicator you'll need to add diodes to have everything work correctly. Jetcash has a topic currently running about the conversion over to LED's
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration

    SALE IS ACTIVE TILL 200 SHIRTS SOLD T-shirt sales supporting 66Sprint's Land Speed Record Build http://www.hondatwins.net/forums/22-...d-attempt.html

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  2. #22
    Member amoeba76's Avatar
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    yes thanx, saw it. i wanna pick a smaller lighter battery too therefore will need this recti conversion too. now i have standard led battery with acid. i wanna go with gel so i can lay it flat under frame under thin seat.
    we are limited here in europe with your american brands, so please bare with me. will this bike turn with a 7A battery? what is the smallest battery i can use to ride randomly 3 hour day trips once a week or less? it will sit in garage all winter long.
    chrome ain't gonna get u home...

  3. #23
    Super Moderator longdistancerider's Avatar
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    The 7A battery won't turn the starter, otherwise it would be fine. If you had a kick starter then you could eliminate the electric one but I'm pretty sure you have a six speed trans w/o the kicker and a kicker can't be added to the 6 speed easily.
    Battery brands here that might be available to you, Shorai, Anti-Gravity, MotoBatt, Scorpion
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration

    SALE IS ACTIVE TILL 200 SHIRTS SOLD T-shirt sales supporting 66Sprint's Land Speed Record Build http://www.hondatwins.net/forums/22-...d-attempt.html

    http://www.hondatwins.net/forums/22-...d-attempt.html and http://www.hondatwins.net/forums/1-p...r-attempt.html
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  5. #24
    Member amoeba76's Avatar
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    exactly that's what i thought. i wonder what will turn it, 8A? 10A? if i had kick i'd do batteryless but...yea 6spd starter only.
    what smallest amperage can i go with? who makes the smallest battery to lay flat?
    unfortunately no antygravity in europe... i like those the best for size and power.
    chrome ain't gonna get u home...

  6. #25
    Super Moderator longdistancerider's Avatar
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    I really don't know what size you'll need. Might review some of the CB350 projects since those seem most often to be the cafe projects using alternative batteries. Nice thing about this series engine is the charging system is so much better than the earlier bikes.
    I know Belgium Customs duties are on the insane side but what about where you're at? Might be worth checking about that to see if importing a battery from the US is feasible.
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration

    SALE IS ACTIVE TILL 200 SHIRTS SOLD T-shirt sales supporting 66Sprint's Land Speed Record Build http://www.hondatwins.net/forums/22-...d-attempt.html

    http://www.hondatwins.net/forums/22-...d-attempt.html and http://www.hondatwins.net/forums/1-p...r-attempt.html
    Road Trip http://www.hondatwins.net/forums/11-...here-i-go.html or "where's Jim now?"
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  7. #26
    Member amoeba76's Avatar
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    pretty steep but sometimes i ship things to italy where they don't necessarily charge duty tax.
    chrome ain't gonna get u home...

  8. #27
    Member amoeba76's Avatar
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    so with the rectifier, you are saying stock will charge over 15v when under high rev load? what if the stock rectifier charges up to 14.5 or 14.4v? it should be ok for the shorai battery, right?
    chrome ain't gonna get u home...

  9. #28
    Senior Member dtsmjr8dan's Avatar
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    Just a bit of terminology in general terms,...

    The rectifier converts AC current to DC current.

    It's the regulator that sets the charge rates/values.
    1979 CM400T (rider),
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  10. #29
    Super Moderator longdistancerider's Avatar
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    Spec is 15V +/-.5V so yes it will be charging too high with the stock regulator. I talked with Shorai about their internal charging voltage regulation, they said it would probably handle it but they hadn't tested for that kind of input voltage and weren't really sure.
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration

    SALE IS ACTIVE TILL 200 SHIRTS SOLD T-shirt sales supporting 66Sprint's Land Speed Record Build http://www.hondatwins.net/forums/22-...d-attempt.html

    http://www.hondatwins.net/forums/22-...d-attempt.html and http://www.hondatwins.net/forums/1-p...r-attempt.html
    Road Trip http://www.hondatwins.net/forums/11-...here-i-go.html or "where's Jim now?"
    Member Map http://www.hondatwins.net/forums/dcMembermap.php

  11. #30
    Member amoeba76's Avatar
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    Tnx for the terminology, much appreciated. So how did u find a below 14v regulator? Any specific kind/name? Most (even for cars) normally all charge around 14-15v. Not sure where to look for one in europe...

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