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#1 |
Join Date: May 2018
Posts: 6
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Hey guys, I've been using this site as a reference for a while now. Finally decided to join in on the fun! So I have a Vader/Baodiao 125cc grom clone. I have been doing some work on it here and there, mainly power upgrades to keep up with traffic in busy Southern California aka 60 mph comfortably. So far, I have installed the mikuni 26mm carb, 17t front sprocket, and aftermarket exhaust w/ gutted cat. Top speed was 60 mph exactly so far! Now I'm looking for a big bore kit as a next step.
Here are my 2 options that I have found: http://www.tbparts.com/product/tb-14...nimport-heads/ http://www.tbparts.com/product/tb-14...nimport-heads/ So my question is: what is the wrist pin diameter on these engines? My research hasn't given solid results. The 141cc bore requires a 14mm pin and the 146cc bore requires a 13mm pin. Do you guys think it would be possible to fit a 14mm piston with the 146cc kit? On another site, it says the 146cc kit has a 14mm option (https://tboltusa.com/store/tbparts-r...ines-p-55.html) On a separate note, would this cam fit in the head? https://tboltusa.com/store/race-cam-...ds-p-2482.html I know this is long, just need some input! Thanks guys. |
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#2 |
Join Date: May 2018
Posts: 6
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I found my answer guys. I feel kind of dumb but it's also a learning experience. The difference with the 2 kits is in the stroke measurements. The cylinder is exactly the same. The 146cc kit is for a 57mm stroke engine which gives it a 146cc displacement with the new 57mm bore, the only difference is the 13mm wrist pin. The 141cc kit is for a 55mm stroke which gives it a 141cc displacement with the 57mm bore, with the 14mm wrist pin. I also found that the vader engine is a variant of the Lifan 125cc (engine no. 1P54FMI). This engine has a 54mm x 54mm bore and stroke AND the 14mm wrist pin. So the 141cc bore kit should fit, as I have seen other users with the vader on this forum with this kit as well. However, since it's a 54mm stroke, it will only give you 138cc.
Still need some guidance on that cam though if anyone has some inputs on that! It looks like the vaders have the big valve YX heads on them so the cam should work. The kit I showed comes with new valve springs as well so it should work nicely with the larger lobes on the cam. |
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#3 | |
Join Date: May 2018
Location: Mountlake Terrace
Posts: 23
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#4 |
Join Date: May 2006
Location: Yuma, Arizona
Posts: 9,047
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I wish I had caught this thread earlier for the first guy--if So. Cal means the L.A. area, I would have directed him to Kronik Racing in Simi Valley, California.
Actually, they sell Vaders and pitbikes and all kinds of power adders, up to and including 190cc engines for them, and are not ashamed to be dealing in Chinese bikes in So. California, no less. I would give them a call to see what parts they have for you. They don't really ship bikes other than locally, but they would ship parts, not to mention, offer advice backed by being in business for several years. http://www.kronikracing.com/
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"They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard |
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#5 |
Join Date: Aug 2018
Posts: 286
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You would be better off going with the zs190. It's a 5 speed.
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2018 BD125-8-x21rs ZS190/Genuine PE28 Kepspeed GP1 Exhaust Protaper se x110 bars/grips 1/4 MotionPro throttle Kepspeed Braced swingarm Chimera rear hub assy Grom Intergrated tail light Superlite Sprockets 17/32 custom made from Japan Chimera Swing Arm Bolt RK MXZ Chain #420 All Balls wheel bearings Motodynamic fender eliminator Coremoto ss brake lines Composimo 2.5 lower link Grom Calipers-w/ebc pads/rotors Michelin tire 140&120 13x4/13x7 fatties Grom forks |
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#6 |
Join Date: May 2015
Location: Houston area
Posts: 1,902
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Many riders prefer the tinkering involved in adding a big block kit over installing a crate motor. To each his own.
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"Its not WHAT you ride; its THAT you ride" Last edited by wheelbender6; 04-02-2019 at 10:06 PM. Reason: Spellin |
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#7 |
Join Date: Aug 2018
Posts: 286
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Buying a China bike will get you plenty of tinkering.
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2018 BD125-8-x21rs ZS190/Genuine PE28 Kepspeed GP1 Exhaust Protaper se x110 bars/grips 1/4 MotionPro throttle Kepspeed Braced swingarm Chimera rear hub assy Grom Intergrated tail light Superlite Sprockets 17/32 custom made from Japan Chimera Swing Arm Bolt RK MXZ Chain #420 All Balls wheel bearings Motodynamic fender eliminator Coremoto ss brake lines Composimo 2.5 lower link Grom Calipers-w/ebc pads/rotors Michelin tire 140&120 13x4/13x7 fatties Grom forks |
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#8 |
Join Date: Mar 2018
Posts: 249
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Question is do they stamp the head with the new engine size?
I believe in California, as part of CARB, for your inspection, they check that the engine matches the VIN on the frame. If that's the case, this maybe the only option for people living in California since that means the ZS190cc is out of the question. And with these having pit bike engines... if you get enough power with the bore kit... could probably run 17/32 for front and rear sprocket. Plenty of people already run 17/34 as a 125cc. |
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#9 | |
Join Date: May 2018
Posts: 6
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https://tboltusa.com/store/tbparts-r...ines-p-55.html This kit has really transformed the bike. It is has a bunch more torque and power. I was able to hit 65 mph in a full tuck even with me being 6 foot, 220 lbs. I also swapped my rear sprocket to a "lightweight" 32 tooth. Helped on the top speed end. Only issue with the kit is that the head gasket seems to be a little thin on the bottom of the oil return so I've had to replace it a few times due to it leaking. Other than that, I would definitely recommend doing this! |
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#10 | |
Join Date: May 2018
Posts: 6
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#11 | |
Join Date: Apr 2019
Location: Central Connecticut, USA. Zombie Free Zone
Posts: 157
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#12 | |
Join Date: Apr 2019
Location: Central Connecticut, USA. Zombie Free Zone
Posts: 157
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earlier in this thread you said this here Vader engine is square @ 54mmx54mm borexstroke.....displacement = (0.5 x 5.4) x (0.5 x 5.4) = 2.7 x 2.7 = 7.29 7.29 x 3.14 {pi}= 22.8906 x stroke 5.4= 123.60924cc stock Vader that kit Only mentions upping the bore to 57mm while the stroke stays at 54, yes?...so using same formula above I only get 137.72511cc displacement So...I'm guessing maybe it gets a cc or two from a deeper dish head or curved piston?? or stacking extra gaskets to get an extra 1-2cc which i have seen many times...OR it's a simple case I'm dumb and can't multiply....or..OR are they simply overstating the CC of the kit like soooo many Ebay sellers from China and elsewhere do in order to compete? |
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#13 | |
Join Date: Apr 2019
Location: Central Connecticut, USA. Zombie Free Zone
Posts: 157
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Sorry for so many replies...just so much to think about. WHat size upgraded carb with what jets should I use for 100% stock Vader 125cc with stock Cali/CARB emissions airbox/exhaust? What size should the carb and jets be if I make exhaust free flow i.e. at least removing the guts off the stock pipe and running a UNI air filter at 300 feet above sea level in 55-70 degree weather? Thanks I would reeaaallllyy appreciate an answer so I don't have to guess and cuz I hear the stock carb, like many China carbs, is bad AND faulty!! Ya know these always crappy stock China carbs really makes me wonder how that really makes emissions better if half the CHina underpowered carbs end up leaking terribly and malfunctioning costing tons of gasoline spill pollution and etra carbon pollution to manufacture a brand new working carb plus the old one takes up room in the rubbish heap!! |
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#14 | |
Join Date: May 2018
Posts: 6
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#15 | |
Join Date: May 2018
Posts: 6
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https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 It's a replica of the Mikuni vm26, so if you wanna buy the genuine Mikuni go ahead. This carb works good though. Only complaint that the fuel/air screw is a little difficult to reach when its mounted on the engine. The idle screw is fine. You have to remove the EGR system to put this carb on as well as plug a hole in the stock cylinder head from this system. However, if you buy that race head then you wont have to worry about that ![]() |
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Tags |
big bore kit, vader 125, vader specs |
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