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Yes I know you can't correctly measure cylinders like that! Like I already said it was all I needed to confirm they were different sizes. One piston had a 1 on top the other nothing but both had made in Japan and prox 01-5510 in side the piston. We've established the last owner just put...

Whats the deal with SBT?

Yup boring it is, machine shop guy here confirmed it. Doesn't do outboards or PWCs. I guess ill have to send it out. Group K website doesnt have an area with any info on cylinder boring.

Seems like it cost a lot more to do myself. But havent priced shipping core yet. you recommend sending off crank to rebuild or reman or new?

All great advice. And already on it.

Who is recommended for this service? Have a 99 787 rfi that id like rebuilt.

Prob not the best angle but both same angle. You see the difference. Actually hard to see in these pics but there's a difference.

I agree. Especially with the rfi I gather. Not optimal but done. I believe this guy was either an idiot or trying to swindle. Probably both. There are theories that it can twist the crank. Small difference but enough where one piston can't even fit in the other cylinder. Hell idk might not...

Lol. I see you.

Ok from what I'm learning it's not unusual for one piston cylinder to be a bit different size on some engines. Not optimal but it's done.

That is rusty. Never had this happen and im no expert but if it were me id find away to get the loose rust off the flywheel either chemically or physically or both . . Or just altogether remove and do it thoroughly. At some point itl probably gum up the bendix clutch and or the splines to the...

yeah... checked all connections , fuses, dess post is good key is good(checked continuity). I don't think its just the start button bec theres no beep with initial placement of key(although at this point it wouldn't surprise me if the button is bad as well). just pushing start button without...

One cylinder is larger than the other and one piston is larger. I know this bec I checked both with caliper. They're both tight fitting to there perspective cylinder. But def diff sizes. The pistons have the same numbers inside so I suspect one was milled down it has no number on top but the...

all fuses are good i checked continuity not just visual inspection. there is only one other fuse on top of the metal plate seen in fist pic #13 and its good. I don't have a rear electrical box that i know of. Which is the cut off relay. There are two starter relays per this diagram(8 & 11). Is...

Thanks for the reply. Its a 2004 GTI LE RFI. No life with key on (is dess). since ive posted this ive gone down a rabbit hole and have come to the same conclusion. Probably have to send it to someone or find a local shop thatll test these.

Ill be taking it to the machine shop and honing or boring cylinders. New rings and pistons if needed.

thanks for clearing that up . Makes perfect sense. The pistons are not diff sizes the cylinders are. Strange or maybe not thing is the larger cylinder was the one with 145 compression and the tighter on was the 90psi. I would imagine thats because although the cylinder is large its still round...

So a broken ring or piston wouldn't affect it holding air pressure in that cylinder? Its my understanding even worn rings can allow air to leak in out of a cylinder when doing a leak down test.

Thanks for your reply. I assume that's what the previous owner did. One cylinder is obviously larger than the other bec I put a piston in it and the piston can wiggle whereas the other cylinder is much tighter fit. Weird thing or not is that the one with low compression is the tighter fitting...

Just bought this from a guy in Charlotte NC named Anthony Tran( dont buy from this guy hes a crook ), he claimed was just rebuilt. found no spring in rave valve diaphragm for rear cylinder, 1999, 787 rfi, has 90psi compression front cylinder and 145 psi rear. took apart nothing obvious. Leak...