Author Topic: HPI ignition install  (Read 15214 times)

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Offline quocle603

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Re: HPI ignition install
« Reply #30 on: April 09, 2019, 07:14:05 PM »
You can order direct from HPI for around $250 + shipping from Belgium.

Yeah, but you get to support such a great small company. They will literally bend over backwards to help people out.
Do not underestimate the power of a two-stroke.

1975 Yamaha RD350 (modified), 1973 Yamaha RD350 (stock), 1971 Suzuki T500, 1981 Yamaha XS650 HS2, 1982 Honda MB5, 1980 Puch Maxi, 1979 Puch Magnum, 1993 Tomos Bullet, 2003 Malaguti Firefox F15 LC

Offline quocle603

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Do not underestimate the power of a two-stroke.

1975 Yamaha RD350 (modified), 1973 Yamaha RD350 (stock), 1971 Suzuki T500, 1981 Yamaha XS650 HS2, 1982 Honda MB5, 1980 Puch Maxi, 1979 Puch Magnum, 1993 Tomos Bullet, 2003 Malaguti Firefox F15 LC

Offline turtle

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Re: HPI ignition install
« Reply #32 on: April 29, 2019, 09:06:16 AM »
I still not have installed it yet. I a bit lost on timing as there is marks all over the place and the directions are terrible. also looking for a place to mount the coil and the little rectifier.

Offline idr5c

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Re: HPI ignition install
« Reply #33 on: May 02, 2019, 04:52:47 PM »
Make sure you confirm the timing via a timing light on the HPI once installed. Mine doesn't fire when the rotor & stator marks are lined up, it triggers a little before. In other words, if you line up the marks and set the timing at 2.0mm BTDC, it will actually fire at 2.3mm (on mine).
Stephen Phillips
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http://www.wmrra.com

Offline m in sc

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Re: HPI ignition install
« Reply #34 on: May 02, 2019, 04:55:00 PM »
true, i had to adjust it with the plate, was easy, but definitely verify :twocents:

Offline turtle

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Re: HPI ignition install
« Reply #35 on: May 07, 2019, 11:31:14 AM »
IF I'm shooting for 1.8mm BTDC timing how is a timing  light going to verify this? I thought the timing was set with a dial indicator. I really wish they had a step by step install manual.

Offline idr5c

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Re: HPI ignition install
« Reply #36 on: May 07, 2019, 12:05:28 PM »
IF I'm shooting for 1.8mm BTDC timing how is a timing  light going to verify this? I thought the timing was set with a dial indicator. I really wish they had a step by step install manual.

Ignition timing is set with a dial indicator, but you can verify that it is correct with a timing light.

Look at the top picture in the PDF below:

http://www.kreidler.be/general%20downloads/HPI%20210_1C2T_eng.pdf

For counter-clockwise rotation, the ignition should fire when the rotor mark is aligned with the left mark on the stator. Use a dial indicator to place the piston/crank at 1.8mm BTDC (or whatever timing you choose), then rotate the stator to align the left mark with the rotor mark.

To verify the timing, clip your timing light onto a spark plug lead and start the engine. At 3.5-4k rpm the rotor mark and the left stator mark should be lined up. If none of this makes any sense, find a forum member that lives nearby to help you.
Stephen Phillips
WMRRA #494
http://www.wmrra.com

Offline Krister

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Re: HPI ignition install
« Reply #37 on: May 07, 2019, 02:40:16 PM »
Don´t forget that HPI both advance and retard timing.

From zero rpm to 3500 it advances timing 10° (from 15 to 25°) and holds to 4500, after that retards another 12,5° at 10000 rpm, don´t have these values in mm.

I have saved some info from old site but don´t know who to credit for this :umm:

Setting at 3,2m gives:
2000>2,9 mm btdc
3000>3,1
4000>3,4
5000>3,1
6000>2,4
7000>2,0
8000>1,7
9000>1,3
10000>0,9

Offline pdxjim

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Re: HPI ignition install
« Reply #38 on: May 07, 2019, 06:17:37 PM »
Can someone (who knows what they're talking about) recommended proper timing setting for HPI on "stage 1" tuned RD350 on premium pump gas?

Wasting time on 2T forums since the dawn of the internet.

Offline m in sc

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Re: HPI ignition install
« Reply #39 on: May 07, 2019, 10:55:37 PM »
i set the base marks at 1.9 on mine, try 1.8 to 1.9


Offline turtle

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Re: HPI ignition install
« Reply #40 on: May 08, 2019, 07:54:09 PM »
i see you used a nut to hold the rotor to the crankshaft but on my 75 it's a bolt. going to need to find a small bolt as well.

Offline m in sc

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Re: HPI ignition install
« Reply #41 on: May 09, 2019, 02:25:34 PM »
that's because I used an LC crank, long story. yes, you'll use an m7 bolt

Offline dugsgms

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Re: HPI ignition install
« Reply #42 on: May 10, 2019, 09:15:17 PM »
So whats involved in integrating the HPI lighting coil into the OEM 12v system? Is it merely connecting the new RR output to the existing red wire?
1970 BSA Lightning
1975 Yamaha RD350
1975 Honda CB400f
2008 Yamaha WR250R

Offline turtle

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Re: HPI ignition install
« Reply #43 on: May 16, 2019, 07:43:52 PM »
NEW ISSUE.... I purchased an m7x20 bolt for the crank to mount the rotor and it still slips( the rotor) with the bolt tight. there is basically no interference fit between the crank and the rotor.  i'm going to send them an email to see what they say.

Offline m in sc

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Re: HPI ignition install
« Reply #44 on: May 16, 2019, 10:43:57 PM »
interesting, 1st i heard of that. are you sure you ordered it for an early small taper rd? the later ones (european) were larger tapers i think. the lc and rz certainly was. they may have sent the wrong rotor on their own mistake.

regarding the 12v thing, yea, should be it.