FXR150 camshaft/head issues

[Damien_Toman]

I was going to say throw the cam away it only slowes you down

I'm a 2-smoke fan too. I have an RD350LC YPVS ready to make into a track bike (I used to race those when they were the latest bikes! )

[Henk]

It's still three one in your favour so I'm in favour of you building a slower engine.
Of course if you do build a rocketship engine I'll have to ply Ray with wine to find out what you have done.

[Damien_Toman]

Interesting. I have played with 2 different FXR engines and both have shown unusual wear on the middle intake cam and head surface. Yours makes 3. I always make sure my oil level is almost spilling out the top. I checked the cam and head after Taupo and it seemed ok but it still seems strange. Sounds like some one has been playing in your engine before you got it with the bolt issues. You really have to make sure the cams spin free when torquing them down. If you want to make it go faster the question is really how much money do you want to spend. I put a $30 2mm oversize standard piston in my engine 156cc still in the rules. Tuned the carb and exhaust and it freshened it up heaps. Or you can do what I am going to do to the same engine and stroke it longer with a standard piston to get the same 156cc but it means splitting the engine and a stroker pin in the crank. Maybe $400 if you do all the assembly work yourself. Then you might as well lighten the crank, more dosh.

I think you are right about running high oil levels. I'll always do that in future. Where can I buy an oversized piston/rings? I'm not planning to split the engine or lighten the crank - sounds far too complicated - especially without a manual. Thanks for your suggestions, Richban.

[Arronduke]

Damien... I was thinking about opening my FXR or do some racing with it first and have a look later this year.

Your experance has convinced me to open it up now.... then I know what I have... oh and ... I can learn from what you do...!

[Damien_Toman]

I only just noticed that you have an RD350LC! (your "signature"). Mega! Is it on the road or do you use it as a track or race bike?

Yes, probably a good idea to check out your FXR150 top end after what Richban said above - my problem is not uncommon it seems. The cams don't have proper ball bearings - they are built to be cheap. They are certainly not made for racing!

[Pumba]

so I'm in favour of you building a slower engine.

You can had me to that list

[Henk]

You can had me to that list

Maybe we can make a couple of restictor plates that we can quietly slide into peoples engines when they aren't looking to cut the exhaust port size to about half.
I have a couple of recpients in mind. You distract them and I'll spin the spanners.

Mind you if we go ahead with this I might have to get Damien to side track you for 15 minutes or so.

[Pumba]

Sounds like a plan to me.

[Damien_Toman]

Get one of these beauties and all your problems are over.........30hp 2-smoker........with none of that 4-stroke complication.

What engine is that?

[thealmightytaco]

What engine is that?

Looks like a Rotax kart engine, designed for competition, be illegal wouldn't it?

[Damien_Toman]

You can had me to that list

Well, I could not believe that you were going so fast at MT Welly with your wrist still all pinned-up from the TRRS accident. Welcome back. I really do need a faster engine to stay on the same lap! Yes, we gotta watch Henk - talks slow but flys when in the mood!

[Henk]

Pumba is now a cyborg. Everybody knows that Titanium makes you faster.

[Damien_Toman]

Looks like a Rotax kart engine, designed for competition, be illegal wouldn't it?

Yes, it would, if that is what it is. Love the "Headbanger" quote .

[woodyracer]

If you use your 125 bucket at TRSS, don't try too hard, and I manage to make my bike go faster, then I have a small chance .

ahahaha, the only thing i have on my side compared to fxr's is relialbility, cant wait to do the TRRS i dont plan on winning it, i plan on having a bloody good time!, Wont be riding the cbr until june~! because the winter series is on the same date next month

[Dutchee]

ahahaha, the only thing i have on my side compared to fxr's is relialbility, cant wait to do the TRRS i dont plan on winning it, i plan on having a bloody good time!, Wont be riding the cbr until june~! because the winter series is on the same date next month

you going to have a muffler that stays on by that stage?