I'm afraid I did not get the chance to install the mentioned rev limiter, but got
enough information to assure me that it would work perfectly on our bikes. Let me try
and fish out some mails I received so I paste them in this mail.....
Message 1 from smart-com.co.uk:
"Hi Charles:
re your enquiries on VTAC:
for the Yamaha Vmax bike, the standard VTAC unit part Number 980512p1/C
would fulfil your requirements, I'm not sure on the vmax what the ignition
arrangement is for the bike, can you confirm to me how the triggering pickup
for the ignition is made, i.e. is the triggercoil on the crankshaft or
camshaft on the bike, and how many trigger coils are there? if there is one
coil similar to the yamaha R6 then ok, but if 2 coils then there will be a
problem.
The unit will connect to the bike using 4 wires and would perform RPM
limiting and give an LED display (red / green) of RPM for peak RPM and
3000rpm below peak.
the cordless option we have not released yet due to it not being fully
developed, but for RPM limiting and LED indication the wireline version is
what we would specify.
PRICE: would be 142 Euros + 15 Euros shipping costs.
DELIVERY TIME FROM ORDER: 5 DAYS at the moment due to offroad sales.
Please goto www.smart-com.co.uk and goto the price and ordering page, there
you will find an order form to printout and you can fax it to us at 0044
1268 510252, we can then confirm your order and delivery date etc.
Take care
Message 2 from our TC:
Charles,
You have a new bike a '99 ... so it only has one pickup coil
monitoring the crankshaft, (w/ two magnetic bumps on the flywheel ...
a long one to identify cylinder 1/3 and a short one ... 70 degrees
behind to identify cylinder 2/4) ... this is a waste spark system,
(has to be since the only pickup is on the crank), and the coils fire
cylinder every revolution of the engine, (like a 2 cycle). So yes ...
it is like the R6. Since their email indicates they would be in
trouble with multiple pickup coils they are apparently enforcing their
rev limit by shorting the pickup coil ... and this is a great way to
do it ... At one time I had a kill switch on my bike ... which had
normally open contacts .... and I wired it across the pickup leads ...
(works fine and last a long time ;>) ....
campbell
Final message from manufacturer:
Hi Charles:
re your mail received below, here's the answers to your queries:
1: I've attached a diagram with this mail (vtacwiring1.jpg) showing how it
all connects up, you'll notice that its different to what is shown in the current O
and M manual (REV H) on the vtac data page on the Smart.com website.
The reason is that the RC version of vtac (part number 980512p1/c) is supplied by 12v,
(no high voltage PSU onboard) and its method of rpm limiting is by connecting
to the stator trigger coil that you have mentioned. I've attached a diagram of the
VMAX generator assembly, showing the pickup coil (item 3) in the diagram. it is
a 2 wire connection to the Ignition control unit, one of the wires will be a 0
volt (earth) connection and the other wire will effectively carry the low voltage
signal for triggering the ignition. It is this wire that you will connect the Blue
VTAC wire to for limiting.
The method of connection is normally by a scotch block type connector which is
supplied with the VTAC product. I don't know what colours Yamaha would use on the
trigger coil but if one of the cores is black then that will be the earth wire, so the
other wire would then be the live wire for connecting the vtac blue lead to.
Having checked on the R6 that we do some work with, I think that it is
exactly
as you have stated, i.e. a waste spark system, due to the single pickup coil
which makes for a straightforward installation.
Have a look at the diagrams and come back to me if you need any further
information.
Regards
[EMAIL PROTECTED]
---------------------------------------oOo-------------------------------------
OK, I think with all this info you should be able to decide.
I'm going to install it since I'm a firm believer that it is a must on the Max
(against my previous conviction that it could be a dangerous gadget to have in some
high speed cornering), but now after so many times over the 11000 mark, I have no
choice.
Regarding the diagrams, I cannot include them in this mail but will send them to you
or who ever is interested.
Regards,
Charles ( [EMAIL PROTECTED] )
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