I thought I was the only one poor in mathematics and calculating ratios.....Thanks for giving me company.

Ok

Ok, when the carbs are in perfect shape, will do the work out again. It only a matter for 15-20 mts changing. I mean, 15-34 right?

^^^ is exactly what I meant!!! See mine is stock barrel bought in 2009 Aug/Sep & has clocked about 22000 (13.5K + 8.5K) & about a month ago it still showed about 128psi in compression meter. This is why I said, LONGER engine life. But again, each his own.

From my thorough understanding, the front sprocks has to be as big as possible & the rear sprocks has to be as small as possible. But with this combo, the pick up is bound to affect on a huge scale (not 15/34 I mean, but generally). Anyway, I'll complete the carbs & then try out, I still have 15/16 sprocks & 39/34/38 sprock sets with me

The experience on TM28 & my learnings on them are worth while for another thread because it dates back to even the pre-rebuild era . I'm keeping it here so that all my experiences are collected under a single thread.

Somewhere during Aug/Sep 2009 when I'd changed the existing (cheated) cylinder to a stock one from YMIS. I was happy for the new one but at the same time, had to do a run in for 1000 Kms. Trust me, I feel stupid on this one because, I now know how easy the work is & at that point in time, I'd got the job done through a mechanic. Thank God, that guy didn't steal the cylinder

So during the run in period, I observed the vehicle to be too tight & being in run-in I never paid much attention on the smoothness. All my aim was to complete the 1000 Kms run-in ASAP.

After the deadline of 1000 Kms was over, I got it serviced from the same mech. He said, the vehicle is kept slightly rich & I still remember the words he said, "Rich na, actualla rich illa, aana richa irukku". Damn!!! confusing statement & this happened sometimes during Nov 2009 on a Sunday afternoon. Next day when I ride to office, I noticed something really strange which I never knew will haunt me for several months...

Yeah, I did experiment with 15/34 once & the pick up went damn bad. I mean, the top speed on every gear with 15/34 combo will take lot of time to match with 16/34. However, I haven't had the chance to test on 5th. The pick up was so sluggish too.

Sprocketting as on RX100 15front 39rear
final drive ratio for rx 100= 39/15=2.6

Hence if front sprocket size is increased to 16 Ratio will be 39/16 =2.437 If Rear sprocket size is decreased to 37T Ra tio will be 37/15=2.46

If rear sprocket size is increased will result in increased pick up but lower top end.
If rear sprocket size is decreased will result in sluggish acceleration and increased top end.
If front sprocket size is increased will result in sluggish acceleration and increased top end.
If front sprocket size is decreased result in increased pick up but lower top end.

@all here is a link for sprocket ratio
Motorcycle Sprocket Ratio Calculator

Thanks yb100! and welcome to the forum!

@Boi :

What about that 135 bore which I seized and then you seized ..twice ? ..but still runs like effin crazy on the pipe ...how much mileage was it giving ? 33? It hasn't been rebored has it ? At least not by you right ?

Ummm yeah thats the one i've been using since 2 years or so and came off when you were tehre. Hasnt been reored, just a change of rings in november.

Used to get 27 after rings change while riding full tilt everyday on BETL. Seizures happened because i ran into reserve while doing 70mph on both ocasions. Both were partial seizures, light marks on the piston which wont matter anyways.

After the several OT's let me narrate the story on carbs

I was able to start up without a choke. Good. So I thought everything is fine; then there's flutter, which I couldn't recognize at that point. Gear 1, 2, 3, 4 & 5 & now when I close the throttle, man it pushes the entire ride & me front & back Lol For the first time I felt as if I were on a rocking bed & not riding

This happened on a Monday & the entire week now I experiement & then learn that the vehicle jerks when the throttle is closed. On Friday, I go mad over this issue & start ripping thinking if there're some block in the carbs or jets then it would be choked away. What a dumb ass !!!

It only gets worse & the smoothness is lost. I now curse myself to have given to the mechanic for service. But remember these experiences are sometimes before July 2010 which means, before rebuilding the Rx. So I console myself saying since this is an old vehicle that is missing rubber on the cylinder & heads such things are prone to happen!!! Damn me

I too had flutter problem on my RX. Figured out it was due to dusty UNI air filter (Thanks to dusty roads) Soaked it in soap solution for 2-3 hours and then gently cleaned it all, oiled. Now bike runs perfect without any hitch!
Maybe its the same thing with you. Also lean the air-fuel mixture just a bit.

Oh!!! Thanks DjVenom. I've passed all these phases; those are my experiences during Aug/Sep/Oct 2010; I'm just sharing those incidents here for record so as to help others

Thought you are still facing some difficulties

Guys, I'm really sick of myself when it comes to calculating FE. This is the (worst) way I'm calculating the FE due to circumstances. I know this method isn't right, but still, the FE should be somewhere closer, but the fact is that, I'm making a blunder somewhere.

I hit reserve at 8974
I fill precise to 2 Ltrs at 9002
Current ODO reading is 9028 & still the vehicle is not in reserve

So I opened up mains & measured the left over which is 850 ml before hitting reserve knob

This is how I'm calculating the FE
(9028 - 8974)
-----------------
(2000 ml - 850 ml)

Equals

54
--
1.150 Lts

Equals = 46.7 No way I'm going to believe this & neither are you guys

Pls help guys!!!

:O

i am not believing it .....

Best way to calculate FE is tank-full to reserve ....

As I told you earlier, have some patience. When you hit reserve, just note the reading and fill it with exact quantity of petrol (say...2 litres petrol). I would not try to measure the quantity by opening up the main and checking. Wait until it hits reserve again. Note the reading and now calculate the difference. This way you would not want to run till the last drop and landing in middle of nowhere.

Having said above, you should least arrive at FE after few above exercise to know if not exact but the range (say 35-40 kmpl...whatever!)

I don't go round about and wait a long time to calculate. See my comments above. Logical, tried and tested.