Need your opinion! 200x bore options...

[rckstrgrl21]

My 200x's engine is done (has horrible compression) so I need to rebuild it. Since I already have the engine out I want to get more power out of it (who doesn't?!?)


So my question for you:

Should I go with Option 1:


BORE KIT 198cc

66mm Piston, 10.5:1 Compression.

Designed as an overbore kit for a stock engine, or as a compliment to our stroker crank. When used with our stroker crank, this 218cc kit has excellent horsepower and impressive torque.

INCLUDES: Piston, pin, rings, circlips, head gasket and base gasket

REQUIRES: Boring, rejetting.


~~OR~~


Option 2:


BORE KIT 198cc HIGH COMPRESSION

66mm Piston, 12:1 Compression.

Designed as an overbore kit for a stock engine, or as a compliment to our stroker crank. When used with our stroker crank, this 218cc kit has excellent horsepower and impressive torque.

INCLUDES: Piston, pin, rings, circlips, head gasket and base gasket.

REQUIRES: Boring, rejetting, race gas 108 octane or greater


I WILL be buying one of these at the end of the day or tommorrow morning, so please help me decide!!! :Bounce :w00t:


They both say they give 218 hp afterwards so what is the main difference between the two?!? :confused: :wondering :confused: More off the line power?

[rdlsz24]

They both say they give 218 hp afterwards so what is the main difference between the two?!? :confused: :wondering :confused: More off the line power?

218hp??? Sign me up!! haha j/k

They are each 218cc, but will have different power outputs from the different compressions. You have to run race gas with the one and not the other. That's a hassle to me so I would go with the first one.

Rob

[devilman]

:wondering 218 hp


i'd go with option 1

[rckstrgrl21]

***Edit***

I appoligize, my brain is hurting from my school work, I know its not 218 hp, its cc. My mistake. I appoligize.


What would be the benifit of the higher compression versus the lower compression?!?

I don't really want to HAVE to use race gas, but I will if I am gaining something substantial.

[rckstrgrl21]

Don't forget to vote!!!! Don't just look......VOTE!!!



What is the compression ratio of a stock 200x engine?

[SWIGIN]

if you dont want to run race gas then go 10.5 to 1

the 12 to 1 wont be as reliable...id go 10.5

[TwoHundredEx]

Race gas is expensive and really isn't something you want for a daily rider.
You'll be happy with the 10.5 and you can still run pump gas on it.

[Mosh]

Race gas is about 6 bucks a gallon.Strike 1 for the 12.5 piston.
85 200x's had somewhat weak starter gears.Therefore,a higher compression piston will make the kicker gears have more stress on them.STRIKE 2 for the 12.5 piston.

The 12.5 piston will make it harder on your foot for kicking it over.Strike 3

My suggestion is to run the 10.5 piston.The engine reliability gets worse with higher compression.They tend to run hotter also,and can blowout headgaskets more often.

[thefox]

The only way I would go with a 12:1 piston (again) is if I were racing because that is what that setup is designed for. Remember, racing engines don't wear out, they blow up first.

[rckstrgrl21]

Well, That didn't take long to convince me of the 10:5:1 compression. I need it to be reliable, Bottom line!


Now my question is:

Is Powroll a good route to take for the bore kit? Are they reliable? Is there somewhere else that is better quality or better benifits that I should look at first?

[Dirtcrasher]

I built an 86 200X 12:1 and I only went with that because I had a Powroll ported head and it's a machine I'll ride once in awhile. Not a daily driver like my 86 350X....

I too would worry allot about the starter gears on the 85 and older 200X's with a 12:1 compression. You also don't have a decompression cable on the 85 model.

[tri-Z ripper]

everyone has chimed in correctly as i can see starter gears for sure are weak and can slip with high compression and RACE GAS COST A BUTT TON!!

[Daddio]

I'd say option 1 for sure, but race gas exhaust sure smells better than pump gas exhaust. :naughty:

[drhatc200]

i got a 10.5 weisco in mine 20 over runs good and my piston pin and rings was $78 from local 4 wheeler shop

[Russell 350X]

I'd go with the 10.5:1, you'll be better off in reliability, and if its just a daily rider, not a racer, you dont need a high comp setup. Just more headaches.

[The Goat]

screw powroll...find a local shop.

they are overcharging for that piston by far.

find a local shop...the whole shebang, plus a gasket kit, will run you around 200 bucks...if that.

local shop can get the piston, and do the boring for you. make sure you bring them the cylinder before they order piston.

[mullet_boy]

I had to put a timing chain in my 84 200x and bored it and put a 12:1 in it while it was apart. I love it. Noticbly more power than it had before. I don't know where every body gets that it makes them unreliable, mine usualy start first or secod kick. And the race gas thing, I run E85. It's cheap, makes it run cooler and oesnt detonate. Maybe I just got lucky, but mine runs great with that combo of E85 and 12:1. Oh and I've never had any troubles with kickers either.

[rckstrgrl21]

I brought it to the only shop anywhere close to me that will touch three wheelers and the want 600 bucks to do this....I spent less to buy the entire trike!



I went to megacycle's website but I dont undersyand the jibberish, can someone translate for me. I just want to know what it costs me to get the best I can, what here do I need?


$155.00 Hardfaced (HF) cam on customer core.
298.00 Needle bearing (NS) billet cam and mounting plate.
No core needed. No boring required.
59.00 #143-01 vernier drilled sprocket for accurate timing
adjustment.
58.00 #205-H R/D valve spring kit with aluminum tops.
101.00 #228-H R/D valve spring kit with titanium tops.
18.00 #30-4016 P.M. valve springs only (use stock tops).
Wiseco piston kit with rings, pin and clips.
10¼ :1 12:1
98.35 #4362 PS #4289 PS — STD 65 mm
103.27 #4156 PS #4289 P2 — .020" 65.5 mm
#4156 P2 #4289 P4 — .040" 66 mm
#4156 P4 N.A. — .060" 66.5 mm
113.60 N.A. #4289 P8 — .080" 67 mm

[The Goat]

well the thing is, ordering it online...you still have to bring it somewhere to have it bored.

was that 600 bucks for a full rebuild or what?

for you to hand them your cylinder, them order a piston, and then bore your cylinder to the correct size...it should be no more than 130$...hell closer to 100...if they try to charge you any more than that...they are trying to screw you.

[Erics350x]

You can buy a cylinder and topend kit together as a package on ebay.
As for the the 218cc, re-read the info from your first post. You only get 218cc when combined with the stroker crank. If you have the cash option #2 with a stroker crank is the way to go.

[roger86200x]

I went through this last year on my 86 200x... I bought the piston online for $100 shipped. It was wiseco 10.5:1 compression .020 over. Then I took the piston and cylinder to the local machine shop and was charged $85 to bore the cylinder and clean up my head/seat the valves.

This is what you need to do as well... $600 is RIDICULUOUS... just fin a machine shop, NOT an atv/motorcycle shop as they rip you off.

The local honda dealer wants $85 an hour to even look at it then parts prices suck and they want 4 weeks to complete....

Taking it apart and doing it yourself is easy, and cheap. The "hardest" part is the timing.

Find a local "machine shop" in your area and call them up and ask them how much it would be for them to bore a cylinder and clean up your head/seat the valves if you bring them the piston kit.

Also, the 10.5:1 does give a notcible kick in the arse! You will probably have to rejet or adjust the carb though...I didnt rejet, just adjusted the mixture and its perfect now...

Do youself and DONT buy it on ebay... get it from a reputable company that wont screw you over....

Any questions PM me!!

Roger

[roger86200x]

I had to put a timing chain in my 84 200x and bored it and put a 12:1 in it while it was apart. I love it. Noticbly more power than it had before. I don't know where every body gets that it makes them unreliable, mine usualy start first or secod kick. And the race gas thing, I run E85. It's cheap, makes it run cooler and oesnt detonate. Maybe I just got lucky, but mine runs great with that combo of E85 and 12:1. Oh and I've never had any troubles with kickers either.

Its not they are "unreliable", its that they wont last as long. As a previous poster stated 12:1/race gas is for racing and race motors blow up before you have them long enough to wear them out. The 12:1 is a lot hotter and has more compression - this puts more stress on ALL of the parts in your motor. If you are planning on keeping the bike, and want it to last forever/be a daily driver and dont want to buy race gas then you should go 10.5:1. The kicker comment just means you havent had it long enough for it to break. The system was designer weaker than that of the later years and it prone to failing faster. It does not mean you willl see it right after rebuilding it, or even a year later - but it COULD happen, and it has a higher chance with higher compression (more stress on the kicker, gears, and shaft).

Roger

[rckstrgrl21]

Ok so the next question:

How much should I bore it?

~ .02"....65.5mm
~.04"....66mm
~.06"....66.5mm
~.08"....67mm

Thank you!!!!

[Erics350x]

it depends on the size of the bore now and how much surface needs to be removed to clean/true it up. usually if its standard the first overbore will work, but have a machinist look at the cylinder and mic the size before you buy anything

[rckstrgrl21]

Oh, ok...I think I am understanding a little more, I thought the bigger the bore the more power I would get, Its all the same but depends on how damaged my cylinder is, correct? so the smaller the better?!?!?

[drhatc200]

excatly you got it mine was wore.7mm thay told me going .10 wouldnt be much so i just took it.20 thay checked it and cleaned cylinder for free when i got piston it was $60 to bore it and hone it. this was done by local honda shop.like said parts was $78 from local 4 wheeler shop he gets and sells parts at his cost

[roger86200x]

If you stay with a smaller bore you can bore it out more times if it becomes worn/damaged. You will get a slight performance increase by boring it out more... it is increasing cubic centimeters after all... .020 was the first bore I did, I could have gone .010 but its woth it to go to 2nd bore, from what I hear... and my bike ran MUCH snappier this way with the 10.5:1

Roger