help needed: 2 strokers plz suggest>> - Team-BHP

Yamaha boy · 15th October 2006, 10:46

hi friends,
I'm a new member from chandigarh n being an autofreak its gr8 to join team-bhp .
i've a YAMAHA RX135 (2002) . M a die hard 2 stroke fan n like everybody else here i also love my bike a lot so i want it 2 be in perfect tune..........
My bike has done 65000~kms. Its running on .50 oversize pistons since ~42000kms. But now i feel tht it has lost its performance punch. Now i've decided 2 redo my bike's engine. I've decided to go for all yamaha original clutch plates, air filter , all cables , brand new muffler(the one which previous rx135 had all chrome. M getting it from yamaha ppl for 1500rs) and NGK spark plug. well well well now comes most imp thing i.e. Piston , rings ,cylinder....here lies my query>>
Friends please suggest me whether i should go for original yamaha cylinder kit(costs arnd 3100) OR should i just go for next over size .75 piston n rings n get the cylinder block re-bored. Please adive which of the above options will give me better results (performance wise)

all valuable replies are welcome
RIDE SAfe
YAMAHA BOY

>>>>>

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turbo_v12 · 15th October 2006, 21:23

Depends upon the amount you are gonna use it...If the usage wont be much then you can probably go in for an overbore...

1500 bucks for all that from the Yamaha guys themselves....awesome..

Yamaha boy · 15th October 2006, 21:55

1500 bucks for all that from the Yamaha guys themselves....awesome..

[/quote]

Na bro, 1500rs just for the muffler , gasket seal, u-bend(the u shaped pipe tht connects cylinder n muffler ).

Rice_tuner · 15th October 2006, 22:08

hey!! nice to find a 2 stroke fan..
i'd say go for the cylinder kit if budget is'nt an issue...its always better to be running a stock bore than an oversize.(this is if your talking bout improving performance by keeping your stock)

If your looking for ONLY performance, i'd say continue with ur current block and get it ported with tuned expansion chambers. I'm saying this cuz u might not want to touch(port) a brand new block.
the 135 has very ristricted ports..hence even a mild porting job does a HELL LOT! as for chambers, get them custom build (tuned length)

cheers

Yamaha boy · 17th October 2006, 15:18

@rice tuner:- bro , here in chd there are many mechanics who do this porting job because of all nearby himalayan rallies. but i've yat met any person who owns a ported rx....
i'm really interested 2 port my rx ...but i have some queries ...plzzz tell me how relieable n durable ported engines are as i have 2 us it daily to commute 2 my college n back ... can i use my ported bike daily for around 40kms?? what about its mantainence will it be more than my stock bike??

airfoil · 17th October 2006, 16:28

I suggest you buy a new 5 speed bore kit and get your existing cylinder ported after reboring to +.75.

The 5 speed cylinder will help the bike rev out better and achieve better top speeds. The 4 speed is better for low end performance. Think of the 5 speed kit as a factory ported cylinder.

fieroid · 17th October 2006, 18:17

incidently here in bangalore, the 5-speed barrel retails at 200rs lesser than the 4-spd. so wht not settle for the best. currently we are building a street bomb capable of doing easily 20hp...will post the pics soon.

jasmeetsingh · 17th October 2006, 19:18

i think you have a better option from yamaha its will be better and restore the prerformance to the fullest

Yamaha boy · 17th October 2006, 20:52

thanks guys for all ur valuable suggestion....

Well finally please suggest should i go for mild porting n changing my current .50 pistion to new re-bore 0.75. and then i gonna install DTW expansion chamber....will all these modification gonna give some fruit??

fuel economy is not an issue ,i can compromise it for the performance

..But yes i have one more question:- Will my ported engine gonna have a long life....because i need to use my bike daily for approx 40-45km. ....

YAMAHA BOY
ride safe!!!!

15th October 2006, 10:46	#1 (permalink)
Yamaha boy Newbie Join Date: Oct 2006 Location: chandigarh Posts: 14	hi friends, I'm a new member from chandigarh n being an autofreak its gr8 to join team-bhp . i've a YAMAHA RX135 (2002) . M a die hard 2 stroke fan n like everybody else here i also love my bike a lot so i want it 2 be in perfect tune.......... My bike has done 65000~kms. Its running on .50 oversize pistons since ~42000kms. But now i feel tht it has lost its performance punch. Now i've decided 2 redo my bike's engine. I've decided to go for all yamaha original clutch plates, air filter , all cables , brand new muffler(the one which previous rx135 had all chrome. M getting it from yamaha ppl for 1500rs) and NGK spark plug. well well well now comes most imp thing i.e. Piston , rings ,cylinder....here lies my query>> Friends please suggest me whether i should go for original yamaha cylinder kit(costs arnd 3100) OR should i just go for next over size .75 piston n rings n get the cylinder block re-bored. Please adive which of the above options will give me better results (performance wise) all valuable replies are welcome RIDE SAfe YAMAHA BOY >>>>> Note from the Team-BHP Support Staff : Slang and SMS Language are STRICTLY prohibited on Team-BHP. Please type in full and proper English for the benefit of other community members. We advice you to read the Announcements and Board Rules section before proceeding any further. Last edited by GTO : 16th October 2006 at 09:50.

15th October 2006, 21:23	#2 (permalink)
turbo_v12 BHPian Join Date: Feb 2005 Location: Thane Posts: 401 View My Garage	Depends upon the amount you are gonna use it...If the usage wont be much then you can probably go in for an overbore... 1500 bucks for all that from the Yamaha guys themselves....awesome.. __________________ R.I.P. ROBIN.

15th October 2006, 22:08	#4 (permalink)
Rice_tuner BHPian Join Date: Dec 2004 Location: mumbai Posts: 128	hey!! nice to find a 2 stroke fan.. i'd say go for the cylinder kit if budget is'nt an issue...its always better to be running a stock bore than an oversize.(this is if your talking bout improving performance by keeping your stock) If your looking for ONLY performance, i'd say continue with ur current block and get it ported with tuned expansion chambers. I'm saying this cuz u might not want to touch(port) a brand new block. the 135 has very ristricted ports..hence even a mild porting job does a HELL LOT! as for chambers, get them custom build (tuned length) cheers __________________ 1986 RD350 1998 Suzuki Shogun 2006 Honda Unicorn 2000 Suzuki Zen (carb, headers,mildly ported)

17th October 2006, 18:17	#7 (permalink)
fieroid BHPian Join Date: Mar 2005 Location: bangalore Posts: 367	incidently here in bangalore, the 5-speed barrel retails at 200rs lesser than the 4-spd. so wht not settle for the best. currently we are building a street bomb capable of doing easily 20hp...will post the pics soon. __________________ There is more to life than incresing its speed!

17th October 2006, 19:18	#8 (permalink)
jasmeetsingh Newbie Join Date: Jul 2006 Location: raipur Posts: 8	2 stroke engine i think you have a better option from yamaha its will be better and restore the prerformance to the fullest

15th October 2006, 21:55	#3 (permalink)
Yamaha boy Newbie Join Date: Oct 2006 Location: chandigarh Posts: 14	1500 bucks for all that from the Yamaha guys themselves....awesome.. [/quote] Na bro, 1500rs just for the muffler , gasket seal, u-bend(the u shaped pipe tht connects cylinder n muffler ).

17th October 2006, 15:18	#5 (permalink)
Yamaha boy Newbie Join Date: Oct 2006 Location: chandigarh Posts: 14	@rice tuner:- bro , here in chd there are many mechanics who do this porting job because of all nearby himalayan rallies. but i've yat met any person who owns a ported rx.... i'm really interested 2 port my rx ...but i have some queries ...plzzz tell me how relieable n durable ported engines are as i have 2 us it daily to commute 2 my college n back ... can i use my ported bike daily for around 40kms?? what about its mantainence will it be more than my stock bike??

17th October 2006, 16:28	#6 (permalink)
airfoil BHPian Join Date: Oct 2004 Location: Hyderabad Posts: 215	I suggest you buy a new 5 speed bore kit and get your existing cylinder ported after reboring to +.75. The 5 speed cylinder will help the bike rev out better and achieve better top speeds. The 4 speed is better for low end performance. Think of the 5 speed kit as a factory ported cylinder.

17th October 2006, 20:52	#9 (permalink)
Yamaha boy Newbie Join Date: Oct 2006 Location: chandigarh Posts: 14	thanks guys for all ur valuable suggestion.... Well finally please suggest should i go for mild porting n changing my current .50 pistion to new re-bore 0.75. and then i gonna install DTW expansion chamber....will all these modification gonna give some fruit?? fuel economy is not an issue ,i can compromise it for the performance ..But yes i have one more question:- Will my ported engine gonna have a long life....because i need to use my bike daily for approx 40-45km. .... YAMAHA BOY ride safe!!!!

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