Ideas on tunning
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You don't need to modify the cases to run the Athena 170 kit. Not sure where you've gotten that from.
The 3BN is the restricted head, 3MB is the non-restrictive head.
You don't really need to faff about with dialing in the Zeel as it comes with 5 maps that they've tuned. Of course to maximise the performance then yeah, you need to dial it in. But it was one of the single most performance increases I noticed.
@Calum im not really sure i will have to check but it didnt have the little step all around like a wall as i remembered the restricted one had i saw some photos as for the athena maybe it will come later on the way now im thinking of new crab v force reeds and the zeeltronic if i find it with a bit more reasonable price
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@MadGyver what about the yz reed cage are you happy with it or should i just go with only the boyesen reeds
@eriondt125r
The YZ reed cage was used because it suited better my setup.
Dropped my max rpm, widened the power band. It's a more civilized bike now.An 170kit as is,with a tuned or aftermarket reed valve,an after market exhaust and a programmable CDI (zeeltronic or ignitech) will make a whole new bike and an 70-80% of the second route.
The other route is from ground up build and tune almost everything in the engine and not only.
A lot of reading, searching, calculations, note keeping, machining, adjusting, combining info/parts.
Will give you a bike like what you see from a specific Portugal tuner, but with more money, time and headaches spend in the end.......knowledge is a side-effect bonus.I will not recommend this torment to you , get the first choice.
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@eriondt125r
The YZ reed cage was used because it suited better my setup.
Dropped my max rpm, widened the power band. It's a more civilized bike now.An 170kit as is,with a tuned or aftermarket reed valve,an after market exhaust and a programmable CDI (zeeltronic or ignitech) will make a whole new bike and an 70-80% of the second route.
The other route is from ground up build and tune almost everything in the engine and not only.
A lot of reading, searching, calculations, note keeping, machining, adjusting, combining info/parts.
Will give you a bike like what you see from a specific Portugal tuner, but with more money, time and headaches spend in the end.......knowledge is a side-effect bonus.I will not recommend this torment to you , get the first choice.
@MadGyver yeah as for now those are the things im considering as i use the bike for enduro too and im planing on later on to leave it only for road use and get it more snapier on throttle and power, rn just thinking of plans i got a idea of lightening the flywheel too for better rpms as it will lose a bit low end torque but for road use thats okay, so yeah a vforce4 a bigger carb maybe 30mm, zeeltronic setup and a bit setting up squish and cylinder height as i dont have a bigg budget things will he coming up slowly and would like for everyone who sees this to bring their ideas and i will hopefully keep you upt with the project
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@eriondt125r
Leave the flywheel alone. The TM28 is ok, DT200R uses the same with different jetting,so it's up to the task. Adding a power jet is a bonus if doesn't have integrated.
Squish is ok and already needs minimum 96 octane as Athena mentions.I tempered with squish,height and combustion dome and now needs minimum 99+ from a good gas station, otherwise pinning heavily. Doesn't worth with gas prices.
I plan to lower the compression and dome shape so be able to run 91 octane gas. -
@eriondt125r
Leave the flywheel alone. The TM28 is ok, DT200R uses the same with different jetting,so it's up to the task. Adding a power jet is a bonus if doesn't have integrated.
Squish is ok and already needs minimum 96 octane as Athena mentions.I tempered with squish,height and combustion dome and now needs minimum 99+ from a good gas station, otherwise pinning heavily. Doesn't worth with gas prices.
I plan to lower the compression and dome shape so be able to run 91 octane gas.@MadGyver im talking about the stock 3mb-00 cylinder asn the stock cylinder head i want to modd them for higher octane fuel for ex like 0.9 0.8 if its possible or a bit higher than the lowest safe squish and as for the carb i will maybe switch to another with the extra jet and the reeds, btw are you running 170cc kit or stock and if so did you feel a diference at power when adding work on the head dome and squish
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@eriondt125r Running an engine where only the crankshaft is stock and fitted with 170cc kit also tuned.
The head tuning was done for fuel efficiency then power delivery in mind when gas prices where lower.
Both where achieved at a cost.
10lt (main tank,didn't measure the reserve) for 260kms up to 7k rpm,screaming bike up to 11.5k.
Power/fun yes.
Usability not so much, I have found only 2 gas stations out of 15 with in 20km radius from where I live,that have the appropriate fuel quality and 100 octane gas.A tuned 3MB head+cylinder is fun and quick. better than a stock 170 kit, overall no.
A very tuned 170 is another level,between a stock 3ET and 3XP,dare to say. -
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@Rallyfinnen sadly doesnt fit mine i have a 4bl engine with 3nc-00 cdi 3 wire servo https://imgur.com/a/MCqdDEW
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@eriondt125r Running an engine where only the crankshaft is stock and fitted with 170cc kit also tuned.
The head tuning was done for fuel efficiency then power delivery in mind when gas prices where lower.
Both where achieved at a cost.
10lt (main tank,didn't measure the reserve) for 260kms up to 7k rpm,screaming bike up to 11.5k.
Power/fun yes.
Usability not so much, I have found only 2 gas stations out of 15 with in 20km radius from where I live,that have the appropriate fuel quality and 100 octane gas.A tuned 3MB head+cylinder is fun and quick. better than a stock 170 kit, overall no.
A very tuned 170 is another level,between a stock 3ET and 3XP,dare to say.@MadGyver have a carb in a trade now a brand new mikuni tm30 with powerjet and some carbon reeds im thinking of doing that as for now what do you guys say
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The best place to get a Zeeltronic ignition is direct from the manufacturer, they ask you to send pictures of your connectors so they can custom make one that plugs straight into the CDI connectors on your wiring loom.
I installed one on my '93 4BL with 3NC electrics and by taking power for the CDI from the brown wire (main feed on Yamahas) on the 3-wire servo connector and running a 5-wire servo, it's possible to install it without altering the main loom at all meaning you can revert back to the £nc CDI/3-wire servo stock setup easily.
Zeeltronic are very helpful and free with advice when you purchase a unit from them as well.
