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Discussion in 'Thumpers' started by Gregster, Jul 6, 2007.
Is that the one with the XL flying over a cop's head on the cover?
Good advice. +1
The engine was rebuilt previously, about ~4,500 miles ago. It runs like new, and has excellent compression, real easy to start, mos of the time. It just leaks so much oil and its hard to keep the engine clean. I do a lot of trail riding so that just covers the motor in sand and it just cakes on after a few rides Hard to keep the bike clean commuting on it and working full time. I usually just wash the engine
I know how that is, my XL started leaking from the cylinder base gasket years ago and I was using it as a commuter too. It was hard to catch it with the wheels stopped long enough to fix it. I eventually did though, planned ahead and bought parts. One saturday i I just did it. I had put a Wiseco 102.4 overbore in about 8,000 mile before that and was not sure if I would need rings so I hadn't bought them, but as I suspected the end gap was still fine so no problem there. Soon it was back together and running without oil blowing back on my pant legs in little droplets.
That's the one. However, my pics would have been better and there would have been no ads.
I just wanted to post a follow-up with the issue I was having. Upper RPM after the secondary carb kicked in, the engine would break up and bog, badly. I installed a Rick's XR600R CDI, and while the bike started and ran much better than before, the problem was still there. At this point, being at whits end, I took the carbs off again. As soon as I removed the bowl from the secondary carb, I found the problem, laying there, as if to laugh at me, the main jet! I swore up and down, that not only had I had the carbs off, rechecked everything, but maybe I didn't. Admittedly, I've taken many shots to the head over the years, and probably mixed up which bikes I was working on, and which carbs I had off. Too many projects. So anyhow, after re-tightening the secondary main jet, the bike fired right up!
Moral of the story is this, never be a fighter for a living, because you will loose your marbles...or main jets.....
I hate to ask this question because for those that know what they are doing will know this answer. I omit that I don't know what I am doing but I am learning as I go.
Is 101.00mm the stock rings for the 83 600r?
Stock bore for the XL600 is 100mm.
101 is an overbore kit.
Honda overbore kits are 100.25 and 100.50
If you are thinking big bore, the largest I know of without doing major mods and using still using original sleeve rebored is the Wiseco 102.4. I ran one in my XL for many miles and years with no problems. I ran it with stock cam and springs etc. It made a noticeable difference in power, with no changes in mannerisms. As they say, there is no substitute for cubic inches.
Hi. Im in the process of a rebuild on my '86 and have purchased a Wiseco 101 11:1 kit. With the higher compression i was wondering about the need to look at jetting to get the most out of it.
I live at sea level, temperature range about 5 - 30 deg C. The jetting I have is 108, 65 main carb and 105 in the other.
Any advise would be appreciated so I can do it while the beast is in bits!
If you dont change anything airflow-wise [ filter , airbox or exhaust ] your bike will run richer due to the increased compression.
Hey, we all started out ignorant. When I was born I knew nothing. Now at 67, I know even less!
And it's all down hill from here on.
I live near sea level too, but have much larger jets in my 87 XL. 125 primary carb, 118 secondary.
Bigger bore usually doesn't need drastically different jets, but yours sounds too lean to start with from my experiences.
Hmm, I'm a bit more conservative...I started off with nothing, after careful budgeting, I found that I still have most of it left
And higher compression will make a lean mixture more likely to ping.
Thanks all, for the replies I guess I will need to research the thread for some more on jetting . It sounds a bit of a mine field !!
I wanna rejet mine but I don't know anything about it. I'm pretty sure I can get more power out of this thing if i changed the jets