ULTIMATE ENGINE What would YOU have/ upgrade for the TW Motor, 300cc? direct swapable
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Thread: ULTIMATE ENGINE What would YOU have/ upgrade for the TW Motor, 300cc? direct swapable

  1. #1
    Junior Member T-Dub-Luv's Avatar
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    ULTIMATE ENGINE What would YOU have/ upgrade for the TW Motor, 300cc? direct swapable

    This is kinda a Hypothetical. Many have built up the 200 motor for more power, bigger clutch, reasons, reasons, etc. etc.

    So if we could have a Yamaha TW from the factory with a second motor option, what does everyone agree would be a "realistic" size for the bike, but enough difference to notice power & happy to pay the extra costs.

    Ideally, I would like to see all the "best" of the other Yamaha motors added into this "new" option. I.E. 6 Gears? THE DURNED KICK START return. Bigger Clutch, Lets make the list of those in replies below, and I can add it all together on a concluding post.

    OH, the most important of this "mystery engine". Should/Could be able to drop into our old 200 bikes with Little to NO mods needed (just carb jets, and air box mod)... is this possible? Have I missed anything obvious other than more fuel and air? Can the CV or TK Carb even take up to 300cc's?

    What should said motor cost us if we purchase complete from Yamaha?

    1. Motor Size in cc ?

    2. Add-ons to make it the ultimate? Provide specifics of what or from where...

    3. Cost?

    4. Would anyone actually buy it and swap out the 200cc ?


    Please refrain from ALL your 2 Wheel hopes and dreams for the TW200, just stay focused on the motor and trans for now.

    This is just for fun currently, but serious questions since I WANT TO LOBBY YAMAHA for a future option with real consumer inputs. This bike is not going anywhere (hopefully not famous last words).

    Thanks All!




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    bore increase horsepower hp torque mpg mod mods updated bigger power xt ttr xt250 ttr230 head cylinder bored wheelie machine thumper
    Ken likes this.

  2. #2
    Senior Member kj7687's Avatar
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    I would say a really "tractory", XR-like motor at 350cc would be it, with minor brake, suspension, and swing arm upgrades (1 to 1.5 inch increase for each). Less than that and it would still bog sometimes / more and you'd need a new chassis -- meaning it wouldn't be a TW. Maybe 30 horsepower and 23 foot pounds at around 7,500/6,500 RPM... This would open up 65 mph cruising and much bigger hill climbs. Of course, IMO, this would never ever happen, but it doesn't hurt to dream.
    Last edited by kj7687; 03-11-2018 at 10:56 PM.
    Tweaker and Ken like this.
    KJ, just KJ, ok.


    Current rides:
    2004 GMC Sierra 1500, 1999 Toyota 4Runner

    Past rides: 2015 Yamaha XT 250, 1997 Suzuki DR 200, 2007 Honda Ruckus, 2007 Yamaha TW 200, 2007 Kawasaki Ninja 500, 2009 Kawasaki KLX331S; 1994 GMC Sierra 1500, 1987 Nissan Pathfinder, 1992 Acura Integra, 1986 Honda CRX, 1989 Jeep Cherokee, 1994 Chevrolet Astro Van, 1979 Volkswagen Rabbit, 1984 Jeep Cherokee

  3. #3
    Senior Member SportsterDoc's Avatar
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    For distance/highway, a 350 cc twin, but that adds weight and my CL350 was a great commuter, but rather heavy for the dirt.
    The 1140 cc motor in my CB1100 is 200# of its 540#, wet.
    To fit the frame, than perhaps a 300 cc single...but keep the carb.

    The most fun I ever had, off-road, was my AT2 (1973-1979), converted to 175cc or my wife's CT2.
    See photo, then envision laydown license plate, a Preston Petty plastic front fender and expansion chamber.

    At 230# (49# less than TW200), it was easy to pickup after a spill or load/unload from a pickup.
    Not the best suspension, probably close to the TW200, but OK for moderate jumps
    Top speed only low 70s, but it got there fairly quick and wheelies were easy.

    Don't think the EPA will let us go back to light weight 2 strokes, so I appreciate Fred's comment: "Maybe just enjoy the bike for what it is."

    Yamaha CT2.jpg

    Did not intend to dampen the thread...so, let's see what others propose.
    Last edited by SportsterDoc; 03-11-2018 at 11:24 PM.
    Miaugi, Ken and redriderjf87 like this.
    2014 Honda CB1100
    2018 Yamaha XT250
    2016 Moto Guzzi V7 II
    2017 Yamaha TW200
    2012 Triumph Bonneville
    2002 H-D Sportster 1200 Sport
    2003 H-D Sportster 883
    1976 Honda CB750F
    1975 Honda CB360
    1970 Yamaha CT1
    1972 Yamaha CT2
    1972 Yamaha AT2/CT2
    1970 Honda SL350
    1970 Honda CL350
    1967 Honda CL160
    1967 Honda CB160
    1962 Honda CA110

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  5. #4
    Member koolhandlinc's Avatar
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    Engine tranny? The problem with simply upgrading the engine is that some states a larger engine means younger riders could not ride it on the street. So I like the option as you suggested.

    The TW200 is meant to be a street able trail bike. I like that! Don't want that to change. Don't need a speed demon on the street. Just a little more street able.

    Transmission:
    1. Clearly 6 speeds! It would be nice is the transmission was more friendly to 2nd gear starts. The idea being that is the 1st gear was a little lower geared for times when the traction is there and the feet are down. The second gear was between where 1 and 2 are currently. Like old trucks that had a granny gear. Never really use 1st unless under a load or a need. Skip it and go directly to second gear most of the time.

    The engine:
    1. clearly we need the kick starter. When off in the wild and the battery runs down. Leaving out the kick starter is like STUPID for a TRAIL BIKE that is used on the street.
    2. The charging system could use a small upgrade. Not a lot but for the times when using the starter a lot. another 5% or 10% without a kick starter is a big deal.
    3. displacement a bump up would be good but I really don't want it to go crazy. I want a trail bike that doesn't guzzle gas.
    4. better balancing in the engine. I have not reved my new bike out yet. Going to wait for the break in miles to be done. But my last bike began vibrating a little to much at full tilt. It got better when I added the 15 tooth so I din't need to rev so much at speed. I actually only ran all out for short distances. But balance seemed to be a issue.
    5. oil cooler. Would like a small oil cooler on it.
    Ken, Smitty Blackstone and WECSOG like this.
    TW200 number 2. 2018 1.1 miles when I picked it up.

  6. #5
    Senior Member Gulfrider's Avatar
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    Oil cooled, carbureted, 250, 6 speed as far as engine goes.Basically same engine. Nothing fancy, still easy to work on.Oh ya peeps have and are doing this mod
    joeband, grewen and Ken like this.
    2005 TW200
    2007 Sportster 1200

  7. #6
    Senior Member joeband's Avatar
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    my ttr226 6spd build/swap has been nothing but smiles since it was completed. the 6-speed is really nice when on slab, and the extra oomph is nice for hills or popping the back end out.

    that said i lost in a head to head with tony's 214... so i'm sure i could get more out of mine with jetting and such.
    grewen, Trail Woman and Ken like this.
    1994 TW226- 6spd. 10w-40 synthetic, XTHidden Content , XT225 stainless header, +2" Joemama swingarm, lizrd cooler, +20% fork springs, +25% rear spring, 2001 speedo w/ trip odo, pro taper atv bars, bark busters, shinko 241 front tire, front fender w/ mr bracket bracket, Hidden Content , o-ring chain, ricochet skid plate, Hidden Content , XT225 rear brake cam lever, folding-tip shifter, cycle rack, kolpin 1.5 aux tank & 1450 pelican case. Hidden Content or Hidden Content

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  8. #7
    Senior Member Chip's Avatar
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    Simple, Yamaha already makes the engine and trans. Either switch the big tires or switch the drive train. Doesn't matter it would make the perfect bike, IMHO.

    https://www.yamahamotorsports.com/du.../models/wr250r
    Tweaker, grewen and Ken like this.
    2017 XR650l
    2014 NC700X
    2005 ST-1300
    Wanted TW450

  9. #8
    Senior Member kj7687's Avatar
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    +1 on the oil cooling.
    Ken likes this.
    KJ, just KJ, ok.


    Current rides:
    2004 GMC Sierra 1500, 1999 Toyota 4Runner

    Past rides: 2015 Yamaha XT 250, 1997 Suzuki DR 200, 2007 Honda Ruckus, 2007 Yamaha TW 200, 2007 Kawasaki Ninja 500, 2009 Kawasaki KLX331S; 1994 GMC Sierra 1500, 1987 Nissan Pathfinder, 1992 Acura Integra, 1986 Honda CRX, 1989 Jeep Cherokee, 1994 Chevrolet Astro Van, 1979 Volkswagen Rabbit, 1984 Jeep Cherokee

  10. #9
    Senior Member SportsterDoc's Avatar
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    Easy to just buy a XT250, but then its got skinny tires and I found the TW better handling (other than front suspension) off-road.
    Did not drop the TW, but dropped the XT 3 times within a couple weeks.

    https://tw200forum.com/forum/general-...aha-xt250.html
    2014 Honda CB1100
    2018 Yamaha XT250
    2016 Moto Guzzi V7 II
    2017 Yamaha TW200
    2012 Triumph Bonneville
    2002 H-D Sportster 1200 Sport
    2003 H-D Sportster 883
    1976 Honda CB750F
    1975 Honda CB360
    1970 Yamaha CT1
    1972 Yamaha CT2
    1972 Yamaha AT2/CT2
    1970 Honda SL350
    1970 Honda CL350
    1967 Honda CL160
    1967 Honda CB160
    1962 Honda CA110

  11. #10
    Senior Member Trail Woman's Avatar
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    2 stroke 250cc with kickstart like the TY250/TW200 hybrid that drove to the North Pole. Including the same handles still available on the new XTs. And no fuel injection. Basically I'd just like to see that hybrid for sale.

    Now that I see the 300 suggestion maybe split the dual... a 4 stroke road version and 2 stroke off road. The Husqvarna 300s looks nimble despite their high displacement and are lighter then 4 strokes..
    Last edited by Trail Woman; 03-12-2018 at 06:15 PM.
    Ken likes this.

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