Re: My Rx100 restoration

The factory recommendation of oil use per litre is 3% or 30ml. Less than the factory setting won't make your bike stall but if it is newly rebored, then it needs oil to keep the walls lubed until the piston rings beds properly. Consequences of inadequate oil might lead to scratch on the liners and in some out of excitement WOT, could even lead to cease.
For first ton kms, set the Afr rich so the engine is cooler and using adequate oil ensures slickness on the walls. It is recommended to use premix until run in is complete. Needle position is always in 3rd position from top and Afr turns for the run in could be half to one turn on the carb.

I'm posting my thoughts for those who are new to RX. Do you know that occasional short burst is good for the engine than riding at one speed? Here you go ..initial 500 kms where the engine tends to mould and that's how the rest of the life it behaves. All all know that we should not be taking the ride to high revs. But there is a small exception to it. It is said that we need to vary the rpm/speed so that the bore doesn't get glaced.
This is what I did on all my restorations...
1st 500 kms 35-45kmph and occasional short burst to 60kmph
2nd 500 kms varied my speed from 40-60kmph with occasional short burst till 70-80kmph.
After 1000kms riding around 50-60kmph and taking up to 70-80kmph. Hold on.....

Get back to workshop/garage and re-tight the bolts and nuts and again calibrate the Afr to optimum.

After doing 2000kms on the odo and if you don't have any suspicious sounds from engine, whack a bit on empty stretches to see if that holds good ie if you realize you entering the powerband.

Re: My Rx100 restoration



Hi friend, great to hear from another enthusiast. Yes please post a pic of your 2s beauty would love to see it.



And if you need any help you can rely on the members of this community that includes me. We will help in any way possible.
No it is not a periodic process. Sometimes if used right the bikes engine need not be touched for a decade. But periodic checks are adviced but not rebuilds. That only applies if you feel your bike straining to perform. We only go to the doctor if we are sick right.

Re: My Rx100 restoration


Of course my friend all I meant was I couldn't get a hold of [MENTION=54239]Nehal[/MENTION].
That is a mouth watering list of parts. Awaiting your restoration with eagerness man. If you need anything just let me know. I will help to the best of my capabilities. Btw double checking is a good idea never start a project without all resources. Cheers

Re: My Rx100 restoration


It is actually not advised as bore gets weaak with every rebore structurally. Upto 2nd oversize only unless absolutly necessary. The new bores are metalurgically weak compared to older series of bores. On those upto 3rd was accepted. Just what I know. So please confirm the metallurgical strength of your cylinder before rebore.

Re: My Rx100 restoration

Jay, usually a factory built engine(bottom end) lasts at least 10-15 years unless its been abused badly. When you see a problem with shifts, transmission, clutch, its time to do a full bottom engine complete rebuild and that will eliminate all other possibilities that old parts might give up in due course of time. Remember, do it once, do it right. Peace of mind.
It all depends on how best the engine is tuned. Yes, as you said the hike would feel dragged after 70kmph and screaming lungs out. But that's not going to stop. I have taken my rx100 beyond 80kmph and after it behaved normal off course it heaved a pile of smoke though. FYI.. RX can go touch 3 digits(rx135) but it's not stable because of its feather lite thus not safe. To answer your question on top speed I would say 95-100 max on GPS. Again depends on rider and his body weight too. Hope this helps.

Re: My Rx100 restoration

[MENTION=72198]Balgi[/MENTION] check your inbox...!!

I have bored 16th OS on my RX ie 54.00 mm and ran 2000 kms without issues. Up to 2mm oversize is very normal on old bores. This comes from my experience.

Re: My Rx100 restoration

54mm isn't RX135 spec. Search for his threads to understand the fact.

Re: My Rx100 restoration

[MENTION=49419]kusmaker[/MENTION] , In my case, old RX100 block took it without issues. It was not RX135 piston that I had it on, as its piston dia is 58.00mm ie 32nd OS in other words, but I had RX115 piston dia 54.00mm with me, so thought would experiment from stock. My friend gave a bore for this experiement and took it forward.

To again answer your question on clutch noise, normally there shouldn't be noise emitting from the clutch ie bell because there are two moving components involved, ie. Clutch bell and primary. But certainly there will be a sound from moving parts but we need to distinguish them before we jump into conclusion that theres something wrong.
There are cases where the noise emitting is evident only when riding. If there is a ply or the improper mating between them, result would be a noise. In the long run, the teeth might get damaged, if, so, It would not be able to make the primary gear move, thus small front sprocket won't move. That's why the factory fitted clutch assembly (Bell and Primary gear) needs to be kept as pair as they are matched for clearance. Mixing with other pair might lead into issues. Infact, if you are aware all the RX135 bell and primary comes with component gradation where there is distinct code which needs to be matched.

Re: My Rx100 restoration


Hey thanx man. Will do.

Re: My Rx100 restoration




Actually what Sriram says is possible and dooable but no mechanic will advice it as it is close to a race mod. As I mentioned in my post the strength and integrity of the bore is compromised after each boreing is done to some extent. Older bores can take some abuse but new ones come made of lighter material if inferior metallurgical quality and as such 16th OS is quite a wonder man. That's like fixing a new Rx135 kit on the bike.

Btw is the noise coming more when the bike idles and reducing when its declutched at idle if so then I had the same problem on my Rx. In fact it was this problem that started it all. It might be the crank gear bolt from the gear that mates with the clutch outer. In my case it was loose and my old mech told me problem would go away with time. I had the presence of mind to take it to my present mech who sorted it out before it did too much damage. Will post pics soon. Do not listen to your mech insist on checking the clutch assay completely. Btw there should be no play between gears or it will eat awy at the driven gear till its irrepairable.

Re: My Rx100 restoration

Sorry for hijacking this thread....

I have 1995 Yamaha Rx 100 and looking for someone who can do decent paint job at nominal cost. Could someone help me in this? I stay near to Indira Nagar / Bangalore.

Re: My Rx100 restoration

I'm from Chennai, however, if you are ok to go around your city, go to Kamanahalli, you'll find many who does decent paint job. Answers are available only that we need to move around to find them. All the best

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[MENTION=49419]kusmaker[/MENTION] - I don't mind asking around to find out the reality than approaching the mechanic. Offcourse I do go and consult experts but they are not mechanics but they have learned from their experience. While being associated for some years with these machines, you hardly let your mechanic to decide than believe in your experience. While I constantly believe in learning everyday so I stopped consulting mechanics, after all not all of them are trust worthy.

To your clarification, you can comfortably go upto 1mm piston on your present bore. IIRC Yamaha was supplying pistons till 1mm for RX100 (seniors correct me if I'm wrong). For sure I know they were supplying piston rings till 0.75mm and I got few too. If you are looking for mileage, then go back to standard is the best choice. Infact, the 1mm will be slightly peppy due to the bigger dia., and drink oil and petrol generously.


FYI..Yamaha India only supplies 2 OS pistons for RX135 right from introduction is not because of the liner incapability to Oversizes. Infact, many have purchased the oversizes pistons of RX-K (Malaysian) abroad which shares the same bore spec and run successfully.

Re: My Rx100 restoration

Guess my riding style is giving my RX some more years then before a rebuild.

Transmitted from 'La Suisse'