Spark plugs?

[xen]

Some good info here guys, thanks.

Re Motul 800, I've switched to it too and using at 50:1. Found it for $100 for 4L at http://www.usprocurements.co.nz/

[Sammikins]

Some good info here guys, thanks.

Re Motul 800, I've switched to it too and using at 50:1. Found it for $100 for 4L at http://www.usprocurements.co.nz/

Love US procurements, bought a few things off them!

[honda_power]

i got 4l for $98 from boyds

[Robert Taylor]

There's another aspect to this (something I learned from a mate who used to race an RD350). Using more oil allows you to run slightly more advanced ignition and/or more compression, as the oil effectively increases the octane rating.

I wouldnt treat that as gospel.

[Robert Taylor]

Feeling more & more comfortable about moving to Motul 800. Reckless using it plus pics of stripped down engines (on KTMtalk.com) looking super clean and good nick prompted me to trying it. Reckless, I knew where you were coming from re oil mix!

We always used this oil in Hurleys Yamahas, even though we were runing other stickers. It doesnt matter how free the oil is, if it causes issues dont use it.

[flyingcr250]

i got 4l for $98 from boyds

i used to get 4L of tts from boys at a real sharp price. oops ive gone off topic again ha ha sorry

[camchain]

We always used this oil in Hurleys Yamahas, even though we were runing other stickers. It doesnt matter how free the oil is, if it causes issues dont use it.

You've piqued my curiousity with that one.
Edit: Think I might have guessed. Reading between the lines yr post and some anecdotal stuff I've just been reading.

[tommorth]

Interesting stuff might change from tts haven't much of it left anyhow and if I change from 32:1 to 40:1 it'll probably work out cheaper.

Danger any chance of letting me know where your at with your jetting for your 200?
Be interested to compare mine is 42p 188m 1.5a/s cek on 2nd clip from bottom 32:1 runs good with this, a little spooge but not much needle could probably drop one but is more tractable as it is. Bikes stock bar carbon reeds and a reed spacer.

Any thoughts on whether the iridium plugs are worth the extra cost? They are often speced from factory but do they actually make a noticeable difference.

[camchain]

I had the impression iridium plugs were more prone to fowling due to fine electrode, but maybe opposite true if better spark? Used them in my $ stroke as recommended as part of stage 2 mods.

[Danger]

Interesting stuff might change from tts haven't much of it left anyhow and if I change from 32:1 to 40:1 it'll probably work out cheaper.

Danger any chance of letting me know where your at with your jetting for your 200?
Be interested to compare mine is 42p 188m 1.5a/s cek on 2nd clip from bottom 32:1 runs good with this, a little spooge but not much needle could probably drop one but is more tractable as it is. Bikes stock bar carbon reeds and a reed spacer.

Your clip position is known as CEK4.

I'm running very similar at this time of year CEK3, 188, 42, AS 1 7/8 aprox, Motul 800 40:1 BP Ultimate.

When I run 32:1 I run CEK4 in winter so looks like your bang on with just AS tuning for the day.

This assumes you have a pre '07. They changed the carb to a smaller 36mm after that from memory and optimum jets will change.

These settings get too rich once temps get up to 18 degrees or beyond.
Then I switch to summer settings of CEK2, 185, 40, AS 1 1/2 aprox.

[tommorth]

thanks interesting to see that our jetting is very similar . Bike is a 2000 so still has bigger 38mm carb has had airstryker put on at some point, think fitted from 02 not sure.

I was running a 40 pilot cek3 and 185 main in summer. good to know that I won't be far off when i change ratios