its ok man no hard feelings....

Please use this thread to discuss all Joel'led R15's.

All Joel'led R15 threads are merged here.

my yzFrankenstein R165

I don't know whether its right time to post this review or not but what happened yesterday is not stopping to post this.
Im a doctor and Im a layman when i put forward my experiences here. I do not bother to mention timings or any other technical details which have already been mentioned by more knowledgeable ppl here, as a rider all i care is what has changed my biking and what my bike now excites me about.
I had been following threads of abhimanyu31, killer, kwokfist and i got really interested in modifying my 2yr old bone stock r15.
I mailed Joel and got quick replies and with all my initial queries cleared i went to his place and my bike was all ready to undergo the major surgery. All the major organs were transplanted
big bore
ecu
air filter
street cam
free flow
head job for porting
clutch and valve springs
did my run-in as per the advise changed oil and oil filter took her to long ride but i couldn't get accustomed to loud exhaust noise, didn't do any top speed or acceleration tests as my pillon was all ready irritated coz of noise
but from what i could feel
1.there was tremendous increase in acceleration, bike didn't feel stressed
2.sixth gear got life, didn't need to down shift while overtaking at higher speeds it had enough juice left
After couple of months i couldn't handle free flow just because it wouldn't allow me to ride as usual, had to be cautious about cops and my dad would constantly brag about it
Finally made decision to revert back to stock exhaust, talked to Joel about it got ecu re-mapped for optimum throttle response headed back home, i didn't ride too often thanks to my exams.
What happened yesterday?
i took my bike to nice road all alone, pulled my bike wot i couldn't believe the acceleration when i just passed 6k rpm, 100 comes in no time, i believe its sub 8-9 sec, top speed of 142 on speedo(my stock would barely cross 127 even with help from air and slope )
i was flattered with over all experience and thank Joel for making my bike a monster
special thanks to all above mentioned members for inspiring.
my experience with Joel was more than satisfying as a customer would want.
Im all ready for stage 2 mods
Im bitten by hotrodding bug.

this review is coming after i have completed 4k km on this set up with no issues so far.

UPDATE:

After 10k kms of running on Big Bore + Headwork + Simota air filter, and an added FFE about 3k kms back.

Had to open the engine head today as the head gasket needed to be changed. There's been some overheating of the engine since a few days, and I couldn't use the bike properly since 2 months due to personal reasons.

Bore and piston are in pristine condition. The cylinder still had some honing marks left even after 10,000kms of hardcore abuse!(Very few people here know how I ride), I extract the highest from the engine at all times, while taking utmost care of it. Been using Shell Advance Ultra FS oil from day one. No seizing of engine even though the overheat warning lamp came up atleast 6-10 times by now. I think the bore really is made of some good material after all, and the piston-rings seated in really well.

NOTE: I think some credit should be given to the way I run-in my engine too, will post it soon.

that's really funny.. "LMAO"

Hi, I do have a question. i would like to know how to increase valve size as you mentioned. because i dont see so much of space. because as per what you say. 5mm is increased which i dont see space here for. please explain so that i can learn.



Thanks in advance

The 170cc head is not the same as used in the 165cc (which is a standard head). It is completely new head with optimized intake & exhaust tracks, combustion chamber & larger valves (size as noted before). Previously, Joel had noted in a earlier post (will need to search for it) that the stock head's flow reaches a saturation point post 165 cc. To get more out of 165+ cc will require a completely new head.

I am awaiting my new 180 cc kit from Joel. The valve sizes I have noted are actually for my kit. Once I get it, I will post a detailed post with photos on my thread.

By the way, my current setup is a 165cc with stock head & stock valves.

so you mean to say its a brand new head made by Joel ? he is casting a new head in his workshop ? not a modified stock head ? WOW that's really cool. is it possible to make a CBR250R head with Bucket type valve system as well. I would love to use that on my CBR.

Dude, your level of sarcasism is just reaching new heights. I have been following the manner in which you are posting things all over the place.
Its a fully modified stock head with larger valve seats, valves, ports, combustion chamber etc. I so wish I could cast my own heads.

@sridar1983; I guess Joel has answered your query. If it really was sarcasm as Joel thinks it is then, I am afraid it was a completely wasted effort as I really didn't get your sarcasm. Sorry, maybe I am too dumb to come up to that level of thinking. Please read the first few lines of the my very first post in my thread; I have my opinion and you can have yours, I have no axe to grind with you.

I normally don't cross a line that I have set for myself i.e. don't insult or be mean to anyone. So, if it was sarcasm, good for you, enjoy the trills its seems to be giving you, however, just out of curiosity, what is it that you have against certain fellow motorcyclist and tribe members? Have they harmed you in anyway? Have they robbed you in some way? Have they insulted you in anyway? Why this certain type of animosity towards them?

This is a open forum, you have every right to express your feelings and opinions. But how about some respect and cordiality towards fellow members. If you have a opinion, express it freely and factually, but how do these jibes help?

Now coming to the issue of whether its a modified head or new cast head; it makes no difference to me as long as I am getting the results.

My thoughts, Head modification is as same as the block modification (interms of aftermarket availability), for a bigger bore a head with suitable bigger dia ports is available. The stock head has restrictions to the level of porting that can be done and its always wise to get a suitable head with bigger dia ports.

You may take a look at this for reference. So likewise we can get the suitable bigger valves and use it with the factory finish, Just like the over size block/piston that we use without modifying the stock block (Without reboring the current block)

(Also in case of R15, the block cannot be re-sleeved/rebored)

Joel you are a race engneer and i am just a mechanic so i am trying to learn from all this. but when somethings are not logically correct, its obvious that i or any one who read the post will have questions if they have basic knowledge about re boring or porting.

I just wanted to know if Joel is casting head or using a imported superhead which is available for performance. and it was a Question to abhimanyu31 since he was staying 24mm intake is used were there is no space to do that..

The valve guide center axis cannot be moved in a stock head which had liquid packets around them and the only way to achieve that is by casting a new head with new design as some performance companies do.

And without moving valve guide center axis, you cannot have 24mm intak and 19mm exhaust valve on a stock head until unless you know magic.so i wanted to know how to do it so that i can learn. I am hear to learn and i not to make fun or post sarcastic comments. I have better things to do than doing this.

Its a straight froward question and i was exited reading his post because i would pay you if you can cast me a CBR head the way i want. so i dont see sarcasism in that.

Sorry if you felt so.

To be clear with, Joel has not answered my question about how it can be done, but he has answered that he is not casting or making any head.

Its a straight froward question with no sarcasism. and if it was sarcasism, you would have understood it by now. and i too have no no axe to grind with you. all i am doing is to understand things better since i wanted to know how he was doing it when there is no space for it.

I dont have any type of animosity towards anyone. if you look at my post i try to say thank you when they try to fight. but there i am trying to learn and nothing els. I dont know what made you feel so. and if i have done something like that unknowingly i am really sorry about it. I didn't mean to.

R u saying we can use 24mm in and 19mm ex on stock cylinder head or r u saying that we need a different head ?? I am sorry i did not clearly understand your post. can you explain.

Excuse me for my ignorance but isn't the R 15 Big Bore 165 a re-sleeved block with bigger piston ?

@sridhar1983; peace brother ... just want the air to be clear of any misunderstandings.

As my school principal use to say 'I will not call you students as we are all students for life. I will call you our boys'. So, my friend, we are all students trying to gain what knowledge we can.

@psr: The 165cc bore offered by Joel uses the mould cavity of 135cc cylinder block (which is the same block used in the R15). However, I don't think its is a re - sleeving job. Its looks like a fresh cast with a sleeve in it. The question is whether the sleeve was press fitted after the die casting of the block or was the block molded around the sleeve.

The latter is preferred as it allows for better heat transfer and also better tolerances of the bore. Anyway, its a fresh casting and not a re-sleeving job.

Instead of stock valve port increase, its wise to get a aftermarket head that comes with the desired port sizes and hence you can use the desired size valves on it. All are in factory finish.


No, Stock R15 is DiaSil TM Block, its not like the cheap 165CC blocks available commonly, it is one mold and cannot be rebored or resleeved. Thats the reason why R15 does not have a oversize piston. If the block goes bad it has to be replaced with the Piston. And also there are a few quality after market blocks that are forged in single mold as like the stock.

The regular 165CC Block is molded separate and then sleeve is attached later. We can rebore or resleeve these 165CC blocks that are available commonly.