Announcement

**karthikdattag** · 12-09-2010, 06:17 PM

I was surfing through net & i found this:

Honda CBR 250R - Launched !!

Jesus Ganesh, you are everywhere!!!!!!

How is it possible that you are everywhere & that too online....

..... Apart from your RX project, i really admire your Internet skills as well. Anyways regarding the above link, your comment was awesome. I think i am becoming your Fan now ....... Seriously......

Cheers.

**SriramEfunds** · 12-09-2010, 06:29 PM

Originally posted by dpak89 View Post

lol!! sure aargee!!! btw u ppl ve'nt done a g2g on DIY till nw?? (according 2 the chennai G2G DIY thread) and@ aargee and all : Reg my bike> : my mech said he did boring = 3rd oversize and its the last boring..... can this be true?? (cylinder is 4TL00 E1) i can still hear a vibrating noise from bore when bike is in nuetral...bt in gear it is not!!! i lastly serviced in SRI motors ashok nagar...they said is normal only and its coz of bad boring!! bt it doesnt affect nu thay said!!! guys any comments??

The mechanic might be right. If the rebore is not done correct i.e clearance, that might lead some audible vibrations emit from the block. When the bike is running it noise might not be audible Again, it is my personal opinion.

**dpak89** · 12-09-2010, 06:31 PM

Originally posted by SriramEfunds View Post

The mechanic might be right. If the rebore is not done correct i.e clearance, that might lead some audible vibrations emit from the block. When the bike is running it noise might not be audible Again, it is my personal opinion.

@sriram: yea even he said like that!! but wont that affect the life of that bore??

**aargee** · 12-09-2010, 08:28 PM

Originally posted by dpak89 View Post

between my mechanic said he put some custom made piston i hope,...!! :s is that possible?

Custom make piston??? hmm...quite interesting to hear; wonder what JD, Sri, psycho98, yamdoot, bigbore has to comment.

Originally posted by karthikdattag View Post

Jesus Ganesh, you are everywhere!!!!!!

Lol; ToonBHP is getting on everyone's nerves these days. So I went ahead & joined with my friends; most of the guys over there are my friends.

Originally posted by karthikdattag View Post

I think i am becoming your Fan now ....... Seriously......

Lol

Originally posted by SriramEfunds View Post

If the rebore is not done correct i.e clearance, that might lead some audible vibrations emit from the block.

+1;
What happens here in local lathe is, these guys DO NOT have accurate measuring instruments upto microns. So what they do is, they simply take piston's size as reference & shave the cylinder. This is not good & suggested engineering way. The recommended gap between piston & cylinder walls are 20 microns from factory. Now imagine the shoddy job; these guys say that the clearance will be automatic due to wear & tear between piston & cylinder walls. My question will be, which one will get eroded? Piston or cylinder? Either cases, we're the losers!!!

**yamdoot** · 12-09-2010, 09:09 PM

Originally posted by dpak89 View Post

l 3rd oversize and its the last boring..... can this be true?? (cylinder is 4TL00 E1) i can still hear a vibrating noise from bore when bike is in nuetral...bt in gear it is not!!! i lastly serviced in SRI motors ashok nagar...they said is normal only and its coz of bad boring!! bt it doesnt affect nu thay said!!! guys any comments??

The bore can be bored upto 8 oversizes. Only the bore job and the piston should be right. Indian made pistons are available upto 4th over so you have one more life left.
Regarding piston mods, it depends which piston he has used. Its usually a failure as it requires high precision machines and engineering. Hows your compression?

**aargee** · 12-09-2010, 09:17 PM

^^^ Guessed it; are you saying the pistons itself are locally made @Yamdoot? Any specific brand or are they nameless

? Obviously my next question will be, reliability & your experience?

**dpak89** · 12-10-2010, 11:23 AM

Originally posted by yamdoot View Post

The bore can be bored upto 8 oversizes. Only the bore job and the piston should be right. Indian made pistons are available upto 4th over so you have one more life left.
Regarding piston mods, it depends which piston he has used. Its usually a failure as it requires high precision machines and engineering. Hows your compression?

@yamdoot : can u pls tell me how to check the compression?? u mean with that compression tester ??

**aargee** · 12-10-2010, 01:27 PM

You'll need compression meter to carry out the compression test. The one I use looks something like this. I remember posting my tests on this forum somewhere, but unable to get.

**yamdoot** · 12-10-2010, 05:11 PM

Originally posted by dpak89 View Post

@yamdoot : can u pls tell me how to check the compression?? u mean with that compression tester ??

Yes, with a compression tester like Aargee said.

**dpak89** · 12-10-2010, 05:42 PM

@aargee and yamdoot: will get back to you after doing it.

**aargee** · 12-17-2010, 12:12 PM

Previous read - http://www.xbhp.com/talkies/thumpers-two-stroke-exotics/11324-rx-rebuild-using-3-yamaha-variants-77.html#post539128

I was literally terrified of holing the piston; but then I picked up courage & then was riding. Next Monday I took the Rx to office, but the heat remained as such whether I ride for a 3 Km or 30 Km, which was little convincing.

But for sure, I've now understood on how these things work (the fundamentals) after having fixed them all by myself & can confidently open up & put things back again

While at the office, my colleague who's a junkie lends his timing gun to check & asks me to follow theory. But when I go home, the damn gun doesn't work. One week passes by fiddling to learn how it works.

Next week, I got it working, but it would keep lighting even at a plastic

; damn back to square one. But for sure, the heat atleast remains far better than what it used to be before; no issues with top end or pickup or smoothness. By now, the gear shifts are smooth, excellent idling (trust me its the same old TM28

) & things started looking good.

Coming up...experience with changing 35/35 to 60/55

**SriramEfunds** · 12-17-2010, 07:41 PM

I have opened a thread in Help me section on engine oil leakage issue I'm currently facing

with my bike.

**aargee** · 12-17-2010, 08:04 PM

Originally posted by SriramEfunds View Post

I have opened a thread in Help me section on engine oil leakage issue I'm currently facing

with my bike.

I guess its yet to get approved; anyway, I've seen this overall last week; I'll bring in some tools this weekend & we'll look into it. I'll be there provided it doesn't rain & my fever subsides.

**SriramEfunds** · 12-17-2010, 08:49 PM

Originally posted by aargee View Post

I guess its yet to get approved; anyway, I've seen this overall last week; I'll bring in some tools this weekend & we'll look into it. I'll be there provided it doesn't rain & my fever subsides.

Yes, it is yet to be approved by the mods. Thanks for offering help to my issue. Overall, I had always negated the idea of opening the case due to the fact that I did not felt necessary. Hmm... let's see what would resolve this issue.

**yamdoot** · 12-17-2010, 11:15 PM

Originally posted by SriramEfunds View Post

I have opened a thread in Help me section on engine oil leakage issue I'm currently facing

with my bike.

Did you pin point the leakage SRI? I have seen many RXs with hairline cracks in their crankcases.

Announcement

RX rebuild Using 3 Yamaha Variants

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment