My fiero port custom widening and clutch replacement..

My bore..


Basic porting tools..

After porting!! Failed to take a before pic..

What u mentioned is right!!! even i feel the need of a fifth gear with this current setup..Well in the older chain sprocket setup, the chain used to tighten every now and then, which used to be very irritating...and also it used to require lubrication once every week because i have removed the chain cover...

And sice u are using the 37T rear sproc, u have lost the initial pickup, but gained in the top speed sector. I am just the opposite!!! i require pickup and torque and lesser downshifting, i am no more interested in topspeeds....

Finally Goodbye to my Babe Fiero F2

Thanks all guys for sharing your wonderful suggestions/experiences on this thread.

I have sold my babe with a heavy heart. Nearly tears were in my eyes........


Reason: Parts are not getting. Last time when I changed the meter wire and pinion, they said that it was last piece. So I thought it won't be nice to keep her for more time.

Next Bike: Yamaha FZ-16, because it's my dream to buy a Yamaha product.

Not going for Apaches anymore, no wonder they will simple stop producing vehicles within 5 years just they did to Apache 150.

Bye Bye

TATA

i wanted to know how much will the TVS Tru4 chain spray can will cost if i want to buy it? And from where? i stay in pune.

the chain spray from motul costs arr 800 bucks.
if you ask me, I wouldn't recommend to use the spray.

I have been running a naked chain (without the cover) for more than 40k kms now, and the thing here is simple.
You keep the chain lubed using the spray, at very regular intervals it takes almost 6 months to last a bottle of spray.
This does keep your chain healthy, and saves wear and tear, but if you just do normal oiling to the chain (used engine oil) it still keeps the chain fresh and you save a lot of money either ways.

The new chain sprocket set would cost around 900 rupees.
So what I do is, invest that 900 bucks on a new chain sprocket set say keep changing the chain sprocket set even after every six months (it runs at-least 8 months even if kept naked) and stop worrying about how loose it gets or how bad the teeth are.

so bottom line is, weather its worth to spend 800 bucks on the spray for 6 months that too for a 900 rupee chain sprocket set ???

If you use an o-ring chain which costs more, maybe then its worth it, well its anyways your call so all the best.

If you want to buy it : 500ml costs 295 100ml costs 95. These are MRP you might get it for less.
Well if you steal it its totally free
Agree its worth a whole new chain set when buying Motul sprays but TVS sprays are quite cheap and good as well. I have tried yamalube and motul but TVS sprays @295 is a good option.

@Nanotech

Sure buddy,next time around we'll all meet up.Good to hear that your bike's performing smoothly and yes a properly done re-bore is way better than a new bore-kit.Perfect bore-kit's are rare and i guess that's why they are called "freak-kits" Then also, no wonder race spec engines are hand built/made.

@Vignesh

Good pics.So you finally got the head ported and for mid-range i guess?Did anything around/to the valve guide?

@gixxer_junkie:
Where have you been all these days?? It was like missing Rajnikanth in a Rajnikanth movie...
Regarding my bike, i've reduced the compression by adding two cylinder packings and 2 gaskets.. Thats the reason why i widened the ports.. Though i miss the 3000 rpm grunt , power at 4000-6000 rpm is really good.. Currently opted for a 44t rear sprocket to equalize the torque loss.. Have to test it in the track very soon..
Regarding the valve guide, nothing done on it..

You and nanotech are the rajnikants(Track-boys) of this thread! You guys can do the dancing around the trees too!! I'd be happy,if i can chase and grab hold of a few skirts(off-screen) like Vinod khanna and Dharmendra.
Well,about the compression blowing off the carb thing i had told you about,i found the culprit to be the RTR kick starter i had installed along with it's gear lever.The RTR kick starter lacks the leverage and hence it used to make the carb blow out when kick starting the bike.I had suspected as much,so now with the stock kick starter the problem has been solved.
Regarding porting work you've done,it's a good thing because it increases the dynamic compression.You might want to cut off the valve guide's portion which reaches into the inlet port and then maybe widen the port as well around it.
About the sprocketing,you've still retained the 13t i guess,since you need mid-range.I am enjoying the 15t and 39t set up.

replies in bold.

@Psr

Well,SBK upgrade eh? A girl was taking up my time(my niece)

About the carb blow-out,you are right about advanced ignition timing and wrong valve timing can cause it along with A/F ratio of pilot circuit being lean.But in fiero's case that's not the case,all the fieros which have RTR's TCI unit have been running on the advance curve only without the need for a TPS.The thing is as long as the valve timing is stock and the A/F ratio is correct ,it won't cause a carb blow out even when running with advance curve.I'm sure you know what i mean when i say that the bike needs to reach a certain rpm for it to start up.So due to higher compression combined with a kick starter which lacks leverage.That is,the RTR kick starter due to it's design,in order to ensure that it clears the rear-sets, can at best be described as being good enough to cause a quarter kick,were as fiero needs half-kick to start it. So this used to make kick starting my bike a chore as it would feel very hard and lacked the leverage to make the higher than compression engine to reach the required rpm for it to start.So this used to blow the carb out when starting.The stock fiero's kick starter is a straight one which gives good leverage to spin a higher compression engine and it's similar to the classic CBZ kick starter.That was straight and needed the foot peg to be folded ,just like in my bike's case,in order to kick start it.

The TPS ensures that at start and Low RPM(LOW throttling) the Ignition timing is retarded to may be 18~22TDC,and advances as the throttle is increased...so if you run without TPS in circuit(open connection) then the Ignition timing will be highly advanced and causes problem of blow back.Just connect the TPS, set it to zero throttle position and see....

@gixxer,
I seriously don't understand the SBK thingy.. You sound more like Navjot Singh Siddhu, never gets to the point plain and simple.. .. Regarding the inlet port, its totally unnecessary for a mid-range based engine.. Since i have high tension valve springs, changing the valve guide profile is not advisable.. I'm using a 13t gb sprocket.. will be testing my bike's performance in a day or two!! Even i had carb blow out issues when i had cv carburettors(bs 26 and 29).. After shifting to vm24, no problems at all.. Though the compression returns though the carburettor, it doesn't blow out!!

@ gix

Where had you been all these days ???
This thread was like abandoned without you, no body was interested to post anything and you call us (me and vignesh) rajnikants of the thread ??

Meanwhile, I do get your point regarding the rtr kicker.
I have one installed myself and it really doesn't give the travel which the fiero one has. In my case, the installation of the self start has eased up that pain, but it still blew my footrest out once i kicked real hard.

You guys down south have soo much knowledge about motorcycles, it really makes me feel like a 10 year old kid who understands everything but knows nothing.
Me and vignesh were having a chat and i was feeling dumb listening to his passionate knowledge about bikes.

@ kantu

How long does that TVS spray @295 last?
do you use it for your rtr, or fiero as well?

I might give it a try.
Seriously dude,do you think this modification has not been done with high tension valve springs?Visit any local lathe here in bangalore who have been doing engine modifications to bikes to run them in the prize money'd illegal drag races and you'll know what i mean.But i do agree with what you say about mid-range porting may not need this.
Yeah buddy i did miss the banter/leg-pulling of the fiero thread.You did a good thing by going for the self start and you know what? From the RTR kick starter installation, i realized as to why most kick start bikes come with a kick starter like that of the fiero.