Let me demistify a lot of your doubts and misconceptions, I have been into RXs for the last 7 years now, own 2 of em, details for both on the page before this, have done enough research on em to know what all is possible on them and what aint.

Lotta you people may not know me and might think i have only 4 posts so am a newbie, you can search for the same nick on RDDreams:Indias First and best Automotive Forum and you will come to know.

4 speed can be converted to 5 speed no problem there, parts needed are...

5 Speed block piston kit - Rs. 4800 (this is the new price) but difficult to get nowadays.
5 speed gearbox - Rs. 3400(old price), not sure of new price
5 speed head - Price unknown, impossible to get new, used is next to impossible
5 speed carb - rs. 2500 brand new, almost impossible to get
sprocketing should be changed to 16/37, but aint necessary
With all these mods I recommend changing the crank too, new price is rs. 2800 again not available.
New bearings advised which cost 800 rs.
new oil seals cost about 150 odd rs
new gasket set cost about 170 rs
labor is free for me cuz i do all this myself, else anywhere from 800 to 1800 is normal

Now that you cant get the 5 speed head, and if you use a 4 speed head your compression goes really low, what do you do, as sandeep said shave and mod the head, find me one guy who can give you the right kinda job a on a head, calculated squish width, angle, MSV figures, centering of squish, combustion bowl volume, squish clearance.

The only person who can do that right is Ron Chinoy.

Secondly very difficult to find a 5 speed carb, my advise use the 4 speed carb, it is way better for a 5 speed than the 5 speed carb.

I know this because I have run 8 different carb setups on my RXs, not counting another one which I have for which an interface plate is being machined.

Malaysian RXZ engine specs are

Bore x Stroke(in mm) = 56 x 54
Top end mating is different
head is different
cdi is different
exhaust is different
no way u can fit that top end on indian bottom end
u cant fit whole engine in indian chassis cuz of the width, unless u screw around with the chassis.

What you can use is the indonesian RXK topend, costs about 10500 INR for the barrel alone.

I would rather get one ported by Ron than spend that kinda money on a normal barrel.

I know it puts out 18bhp @ 9000 rpm but it has different reeds, head, and a 26mm carb.

Best mods one can do an RX is RDD Digital CDI.
UNI air filter
High compression head from RDD.
OEM Yamaha fiber reeds.

Anyone want any more info on any of this or related to RXs, can PM me, or mail me on torqu3e AT gmail DOT com

I own a 1993 yamaha RX100

Mods done

Some desi Sh#ty alloys(but they look good) - RS. 3500.
Electricals changed from 6 Volt to 12 Volt - almost Rs. 4000
RDD cdi- RS. 2200 (i think its worth it)
Pulsar analogue Speedo console :
tacho working and giving acurate readings. not sure about the speedo it self. - Rs. 1200 (meter labour extra)
MSR toe gear shifter: Motocross style- Rs. 900
would be getting fibre reed today
RX135 Seat - Rs. 400
DURO 100/90 Tubless in the rear - RS. 1600

Mods done and taken off

BOX swing arms

TVS victor : did not feel any difference.

CBZ : the bike handels like a bullet on the corners. but the straight line handeling was real good.

but reverted it back to the originals

history

got the engine rebuild first time in 2006

second time it was done in 2007 (my bad did not check the 2t oil and i was coned)

further mods planed

Engine rebuild
conversion to 135 5 speed

change wheels to 17 inch (from r15 )

rear and front disk brakes

a repaint in original colors.


things that i noticed:

The bike had original brakes till i got then changed then lately like 4 months back that was really stupid of say amazing. and there was barely any thing left on them but still they were not screaching.

i dont remember how did i not notice them while i was getting the alloys.

THIS IS A OLD PIC

This is My Mustang
1994 Model. Recently Restoration Done.

Hii im abhishek,
Guys,sincerely need your help!!! I own a yamaha RX135, recently iv been having problems with the electricals. The battery just got damaged no wonder how (probably due to overvoltge)..
I replaced the rectifier and also got the battery replaced which was in warranty but again the battery died in a few months. Till now i was using the bike without the battery but recently my starting coil got damaged. I fixed a new one in but within a week again the starting coil has died. The local mechanic suggests i redo the wiring entirely. I am really not sure of this. Can anyone tell me what is the probable cause of such a problem?? Or what part of the electrical system needs be checked? Also how much would it cost to solve the problem?
Realy looking forward to an expert opinion before i take any further decision.

I own a 1993 yamaha RX100

Mods done

Some desi Sh#ty alloys(but they look good) - RS. 3500.
Electricals changed from 6 Volt to 12 Volt - almost Rs. 4000
RDD cdi- RS. 2200 (i think its worth it)
Pulsar analogue Speedo console :
tacho working and giving acurate readings. not sure about the speedo it self. - Rs. 1200 (meter labour extra)
MSR toe gear shifter: Motocross style- Rs. 900
would be getting fibre reed today
RX135 Seat - Rs. 400
DURO 100/90 Tubless in the rear - RS. 1600

Mods done and taken off

BOX swing arms

TVS victor : did not feel any difference.

CBZ : the bike handels like a bullet on the corners. but the straight line handeling was real good.

but reverted it back to the originals

history

got the engine rebuild first time in 2006

second time it was done in 2007 (my bad did not check the 2t oil and i was coned)

further mods planed

Engine rebuild
conversion to 135 5 speed

change wheels to 17 inch (from r15 )

rear and front disk brakes

a repaint in original colors.


things that i noticed:

The bike had original brakes till i got then changed then lately like 4 months back that was really stupid of say amazing. and there was barely any thing left on them but still they were not screaching.

i dont remember how did i not notice them while i was getting the alloys.

THIS IS A OLD PIC