Ideas on tunning
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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 3NC CDI/3-wire servo stock setup easily.
Zeeltronic are very helpful and free with advice when you purchase a unit from them as well.
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@eriondt125r
You can actually buy any PCDI-10VT and fit it on a DT, but it just takes more effort
The CDI is the same, but connectors differ.
A 3-wire servo can be gutted and converted to 5-wire. There are also 5-wire chinese 'replica' servo's sold on aliexpress, but they are also a bit expensive (just under 100EUR form memory). I use gutted RC-servo's on two bikes with Zeel, and that works too. Basically it just needs two wires for the motor and three for the pot.
I use the RD350 Zeel on one bike (and a friend uses one too), and I ordered the same this time because it's cheaper However the RD350-version has no connectors, so you have to use some generic connectors and replace the originals on the bike. -
@HOTSHOT III
I found that the problem is delivery time when getting them directly, last time I asked it was months.. They are very good to deal with, and they were also willing to do a special version where the map-switch would change both ignition and power valve maps. I don't get why they have two PV maps, but only one is in use. I think both maps should be toggled when you 'flip the switch'. That would give two totally different engine characters with the map switch. -
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 3NC CDI/3-wire servo stock setup easily.
Zeeltronic are very helpful and free with advice when you purchase a unit from them as well.
@HOTSHOT-III damn just did enduro on sunday and the bike shut off instantly its having electric problems im having a very weak spark the bike doesnt turn on at all tried bypassing the killswitch and the kickstand switch no result and now i want to check the pickup coil from the stator im not that good with electrics but im trying my best to find the problem
