First plug chop help

[Green acres]

Ok thanks man I'll check the float level tonight and order some new jets to try out. Will the "g" plug make that much of a difference over a "s" series plug? Do you think the stock jetting is ok for my mods with the injector installed? Because its had the stock jetting and the mods since day one and I never ran into problems except when the oil line came off the carb and it blew up but that was my fault. Not trying to contradict anyone just trying to figure out why it worked so well with the stock jetting all these years.

 

[Green acres]

I bought a BR8ES and a B8ES plug for my blaster but I emailed NGK in regard to the BR8EG I've been running and they said its a direct swap and I should not have to rejet for using a G power plug. Should I still run the "S" plug and chop it to check the jetting if its supposed to be a direct replacement?

 

[89blaster89]

I bought a BR8ES and a B8ES plug for my blaster but I emailed NGK in regard to the BR8EG I've been running and they said its a direct swap and I should not have to rejet for using a G power plug. Should I still run the "S" plug and chop it to check the jetting if its supposed to be a direct replacement?

yes use a b8es I:I

 

[Herpderplol]

Yes run the S. Always do what the manual says, no matter what the other company says, they are just a performance part, not oem

 

[Wheels]

I've run that plug with no issues, it is the same one used by my YZ250. Here's a link to NGK's plug type guide: NGK Spark Plugs USA
I would use the standard one for plug chopping bc of what Blaaster said and because they are cheap.

 

[Blaaster]

The G plug will work fine when riding but will not return a reliable plug chop.

Yamaha recommends a B8ES.

I believe the B8EG is designed for exotic fuel mixes.

Substituting a spark plug will not call for any changes in jetting.

Why did you choose 40:1, in my mind that is not enough oil for a 2 stroke under 200cc?

 

[Blaaster]

Not trying to contradict anyone just trying to figure out why it worked so well with the stock jetting all these years.

I am not getting into this discussion, there are too many variables.

Based on your mod info, the ballpark jet to start a plug chop should be a #280..

 

[Green acres]

Thanks for all of the info here! I know this question is a can of worms but why do some people recommend the non resistor plug when the manual calls for a resistor in my 04? I understand the pros and cons of each I just don't know why some years call for the resistor and some don't. Just thinking out loud, could the resistor plug be used to keep interference out of the TORS system? As for the oil, I chose 40:1 because the bottle of oil calls for 50:1 and I don't really trust it but thought 32:1 might be a little to much plus almost everything I own with an engine is a 2-stoke and the ratios are all over the board so I figured 40:1 would be a good starting point.

 

[Herpderplol]

All small two stroke engines dont need much oil, which is why they are 40:1 or 50:1

A larger motor call for more oil.

Look at it this way:

Stock ratio is 18:1
You change it to 40:1 it barely have any oil, less than half stock.

Most people run 32:1 some 25:1

Personally i would do 25:1

 

[Larry's Shee]

BR8es and B8es are same heat range, the "BR" plug has built in resistor to eliminate radio interference.

Maybe the only reason you haven't had trouble (yet) is because of running the lid and snorkel. You have yet to actually post what main jet you actually have, or wether you bought with pipe on or had installed by shop (who may or may not have re-jetted).

Until you pull the float bowl and jet no one will know for sure what is in there.

 

[Green acres]

From what I've read on this website is that yes im getting less oil in every gallon of gas but since the fuel/oil are thinner at 40:1 the engine is getting the oil it needs because the carb is pushing more fuel/oil mixture through the jets and the only thing I would be hurting is the ring seating. Am I correct or did I read it wrong? Or should I just switch to a richer mix and jet accordingly? As far as the stock injector I've read about 20 different opinions on stock ratios so it was hard to determine were my bike was running before I put the block off kit on.

 

[Green acres]

BR8es and B8es are same heat range, the "BR" plug has built in resistor to eliminate radio interference.

Maybe the only reason you haven't had trouble (yet) is because of running the lid and snorkel. You have yet to actually post what main jet you actually have, or wether you bought with pipe on or had installed by shop (who may or may not have re-jetted).

Until you pull the float bowl and jet no one will know for sure what is in there.

Yes the Blaster came with the pipe and air filter from the dealer when I bought it brand new. It has a 230 main jet with the needle in the middle clip and I don't quite remember what the other jets are at. I can tell you its never not had the pipe and filter and its never had anything bigger than a 230 main.

 

[Green acres]

Sorry if this is getting a little long but I just like to ask a lot of questions and like to know peoples reasons for things.... I think I may switch to 32:1 or 25:1 and then try both the resistor and non resistor plug and post a picture of the plug chop and go from there. In the mean time I will get on ordering some new main jets

 

[Blaaster]

If you change the oil ratio to a heavier oil concentration you will need to increase the size of the main jet.

I run 25:1 and in winter I need to richen up the needle to compensate for the less fuel in the mix.

R series or not, the plug chop will be the same on both plugs.

The R stands for resistor which helps stop electrical interference to RF devices.