1990 F2 Wont Rev out past 6k

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Sitnlow4life
Posts: 60
Joined: Sat Mar 18, 2017 12:45 pm
Location: Detroit

Re: 1990 F2 Wont Rev out past 6k

#31 Post by Sitnlow4life » Tue Apr 18, 2017 8:19 am

I'm running BR8EIX right now.

Do they needs to be gapped at a specific value ?

Thanks again
1990 RZ350 with Toomey Pipes and Vforce Reeds

MK
Posts: 814
Joined: Sat Nov 26, 2005 11:44 am
Location: Wolfenbüttel, Germany
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Re: 1990 F2 Wont Rev out past 6k

#32 Post by MK » Tue Apr 18, 2017 9:09 am

Everything between 0.5 and 0.7 mm will work.
BTW: If you purchase a Zeeltronic, then pick the PDCI and not the PCDI as the latter one requires a working source coil (note the subtle difference).
This one would work: http://zeeltronic.com/page/pdci-11v.php" onclick="window.open(this.href);return false;

The B-plugs have no resistor and the advice was meant to solely use them to debug the stock ignition.
In connection with programmable ignitions you must not use them unless you like funny side effects like temp gauges going nuts, ignition cutting out at WOT & high revs or handhelds showing complete nonsens.

In fact you should try new plugs at least two times.
I once screwed in brand new BR9ES and they were as faulty as those I unscrewed before. The next new pair cured the issue ....
Bye
Martin

oldracer
Posts: 199
Joined: Mon Jun 06, 2005 12:27 am
Location: ontario, canada

Re: 1990 F2 Wont Rev out past 6k

#33 Post by oldracer » Tue Apr 18, 2017 12:06 pm

Check the resistance values of the ignition windings in the stator if you haven't already done so, it sounds as though one is breaking down as its temperature rises.
dave.

Sitnlow4life
Posts: 60
Joined: Sat Mar 18, 2017 12:45 pm
Location: Detroit

Re: 1990 F2 Wont Rev out past 6k

#34 Post by Sitnlow4life » Wed Apr 19, 2017 8:11 am

So last night

I verified the readings on the stator as well as alternator.

All within spec

Pulled the carbs to verify float height ... They were at 20mm

I did notice that I had the carb bowls swapped .

I went ahead and put the right bowls with their correct sides .

Reassembled with 2 brand new BR8ES plugs .

Ran the bike and same thing ... No power after 4k
Pulled the plugs and they are soaked again.

See pics in the link on previous post .

Thanks
1990 RZ350 with Toomey Pipes and Vforce Reeds

Creep
Posts: 5
Joined: Thu Mar 26, 2009 1:51 am

Re: 1990 F2 Wont Rev out past 6k

#35 Post by Creep » Wed Apr 26, 2017 8:54 pm

I have an 89 rz350 same color blue as yours an am having the exact same problem. I pretty much went through the same trouble shooting as you and came up with nothing. The bike has been sitting for almost 2 years now.Have you found out what the problem is yet?

Sitnlow4life
Posts: 60
Joined: Sat Mar 18, 2017 12:45 pm
Location: Detroit

Re: 1990 F2 Wont Rev out past 6k

#36 Post by Sitnlow4life » Fri Apr 28, 2017 10:24 am

Creep wrote:I have an 89 rz350 same color blue as yours an am having the exact same problem. I pretty much went through the same trouble shooting as you and came up with nothing. The bike has been sitting for almost 2 years now.Have you found out what the problem is yet?
Yes I have found the problem .
It was float bowl height .
Haynes manual says to measure from gasket surface to top of the float .

Guy I spoke to on the rz350 page on Facebook is from Montreal .

He pointed me in the right do very knowledgeable, the measurement should be taken from the base of the carb to the top of the float .

The correct measurement is 21.0mm

I set it there and took it for a ride and bike reved out fine , ran great for a about a mile then , I ran out of fuel , had to bring the bike back home on the choke .

Pulled the plugs and they were white !

Too lean . But at least I know what knob to turn to get results .

And I know it's nothing electrical.

So yesterday I changed the height on both carbs to 20.3mm to add more fuel in the carbs .

Went for a quick ride and the right side plug looked like a nice coffee color , the left side was a very dark brown .

I adjusted just the left carb to 20.5mm and took it for another ride .

Boom both plugs look like a nice coffee color .

Weird thing is ... Only half of each plug is the right color , the other half remains white .

Is that normal for these bikes ?

Also bike seems to break up a bit around 6500-7000.

It will rev out but not making the power there like it should .

Any suggestions ?

Mains are 185 pilot is 27.5

Thanks
Todd
1990 RZ350 with Toomey Pipes and Vforce Reeds

justind97
Posts: 202
Joined: Mon Aug 10, 2015 8:57 pm
Location: Ottawa, Canada

Re: 1990 F2 Wont Rev out past 6k

#37 Post by justind97 » Fri Apr 28, 2017 12:26 pm

Sitnlow4life wrote:
Weird thing is ... Only half of each plug is the right color , the other half remains white .

Is that normal for these bikes ?



Thanks
Todd
That would be because one side is pointed towards the exhaust (white) and the other is not. You can index the plug so the open end of the electrode is pointed towards the exhaust port.
Use a sharpie to mark where it is initially, then tighten check and either add a washer, or remove the washer on the plug.

185 jet, are you running Powerjet carbs? with PJ carbs you're at 245 which is not rich enough if you have pods or exhaust in my opinion.

Sitnlow4life
Posts: 60
Joined: Sat Mar 18, 2017 12:45 pm
Location: Detroit

Re: 1990 F2 Wont Rev out past 6k

#38 Post by Sitnlow4life » Fri Apr 28, 2017 4:01 pm

So index the electrode toward the carb ?

The bike has the stock airbox, and the stock power jet carbs
1990 RZ350 with Toomey Pipes and Vforce Reeds

justind97
Posts: 202
Joined: Mon Aug 10, 2015 8:57 pm
Location: Ottawa, Canada

Re: 1990 F2 Wont Rev out past 6k

#39 Post by justind97 » Fri Apr 28, 2017 9:40 pm

Sitnlow4life wrote:So index the electrode toward the carb ?

The bike has the stock airbox, and the stock power jet carbs


Yes. You want the spark to ignite the fuel the closest to the exhaust port first as that what exits first.

hondaror
Posts: 2828
Joined: Mon Mar 03, 2014 8:44 pm
Location: Alberta, Canada

Re: 1990 F2 Wont Rev out past 6k

#40 Post by hondaror » Fri May 19, 2017 7:46 pm

The power jet size is added to your main jet size for a total main jet size. I think the power jets are 40 and 45, right and left barrel.
Sounds like that bike was jetted well for stock settings.
Rory
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine

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